The expression 0.01E+0.003E^2 gives the thickness in millimeters (mm) of the insulation needed for a high voltage cable. E is the number of kilovolts carried by the cable. What thickness of insulation material is needed for 7 kilovolt cable?
Answer: 0.217 mm
Step-by-step explanation:
Exit Felix was given $125 for his birthday from his grandmother. He plans to put this money toward the purchase of a $250 skateboard. The remainder of the money he plans to earn mowing lawns for the rate of $35 each. What is the least number of lawns Felix will have to mow in order to have enough to buy the skateboard?
An investment of $200 increases at a rate of 9.5% per year. What is the growth factor, b?
The standard form for rate equation is:
F = P (1 + r)^n
or
F = P b^n
So b = 1 + r
In this case, r is given as 9.5% or 0.095. Therefore:
b = 1 + 0.095
b = 1.095
The growth factor is 1.095.
Suppose? 30% of the people in your town talk on their cell phones and drive at the same time. if you stood on a busy street corner and watched 50 people drive? by, about what proportion would you expect to see talking on their cell? phones?
An equilateral triangle has sides of length s. If each side is increased by 3, represent the new perimeter in terms of s.
Use the remainder theorem to determine the remainder when d4 + 2d2 + 5d − 10 is divided by d + 4.
The remainder theorem states that the answer when d + 4 is substituted into the whole equation, the remainder would be the answer divided by d + 4. Therefore:
d + 4 = 0
d = -4
Evaluating when d = -4:
d^4 + 2 * d^2 + 5 * d − 10
= (- 4)^4 + 2 * (- 4)^2 + 5 * (- 4) – 10
= 256 + 2 * 16 – 20 – 10
= 256 + 32 – 30
= 258
Therefore basing on the remainder theorem, the remainder would then be:
Remainder = 258 / (d + 4) ---> Answer
The highest temperature recorded in the town of Westgate this summer was 180°F. Last winter, the lowest temperature recorded was -15°F.
Find the difference between these two extreme temperatures.
△DEF has vertices D (2,2), E (-2,-1), and F (-3,5). Complete the following charts indicating the location of △D′E′F′ and △D″E″F″.△DEF is reflected in the y-axis. Then it is translated along the vector ⟨3,−5⟩. Enter your answers as points using parenthesis and commas. Do not use any spaces.
What is the lateral area of the drawing?
A. 425 km2
B. 1021 km2
C. 200 km2
D. 114 km2
Answer: Option 'D' is correct.
Step-by-step explanation:
Since we have given 4 trapeziums with parallel sides :
[tex]a=8\ km\\b=4\ km[/tex]
For height 'h'. we will consider the right angled triangle with
Perpendicular = 4.3 km and base = 2 km ,
We need to find the hypotenuse:
[tex]H^2=B^2+P^2\\\\H^2=2^2+4.3^2\\\\H^2=4+18.49\\\\H=\sqrt{22.49}\\\\H=4.742\ km[/tex]
Now, Lateral surface area of the figure = 4 × Area of trapezium
[tex]4\times \frac{1}{2}\times (8+4)\times 4.742\\\\=113.81\ km^2\\\\=114\ km^2[/tex]
Hence, Option 'D' is correct.
The point $(r,\theta)$ in polar coordinates is $(7,5)$ in rectangular coordinates. what is the point $\left( 2r, \theta + \frac{\pi}{2} \right)$ in rectangular coordinates?
Final Answer:
The rectangular coordinates of the point[tex]$\left( 2r, \theta + \frac{\pi}{2} \right)$[/tex], where [tex]$(r, \theta)$[/tex] corresponds to the polar coordinates (7, 5), are approximately (-13.59, 11.54).
Step-by-step explanation:
In polar coordinates, a point is represented as [tex]$(r, \theta)$[/tex] , where [tex]$r$[/tex] is the distance from the origin, and $\theta$ is the angle with respect to the positive x-axis. In rectangular coordinates, the point is represented as (x, y).
Given that the point [tex]$(r, \theta)$[/tex] in polar coordinates is equivalent to the point (7, 5) in rectangular coordinates, we can express this relationship as:
[tex]\[ x = r \cos(\theta) \][/tex]
[tex]\[ y = r \sin(\theta) \][/tex]
For the given point $(7, 5)$, we have:
[tex]\[ x = 7 \cos(5) \][/tex]
[tex]\[ y = 7 \sin(5) \][/tex]
Now, you want to find the point [tex]$\left( 2r, \theta + \frac{\pi}{2} \right)$[/tex] in rectangular coordinates. This can be expressed as:
[tex]\[ x' = 2r \cos\left(\theta + \frac{\pi}{2}\right) \][/tex]
[tex]\[ y' = 2r \sin\left(\theta + \frac{\pi}{2}\right) \][/tex]
We know that [tex]$\cos\left(\theta + \frac{\pi}{2}\right) = -\sin(\theta)$[/tex] and [tex]$\sin\left(\theta + \frac{\pi}{2}\right) = \cos(\theta)$[/tex]. Substituting these into the equations:
[tex]\[ x' = -2r \sin(\theta) \][/tex]
[tex]\[ y' = 2r \cos(\theta) \][/tex]
Now, if we substitute the values of [tex]$r$[/tex] and [tex]$\theta$[/tex] from the given point (7, 5):
[tex]\[ x' = -2 \times 7 \times \sin(5) \][/tex]
[tex]\[ y' = 2 \times 7 \times \cos(5) \][/tex]
Calculating these values will give you the rectangular coordinates of the point $\left( 2r, \theta + \frac{\pi}{2} \right)$.
There are 9 different positions on a baseball team. if a team has 18 players how many different line-ups can the team make?
Final answer:
To find the number of different line-ups a team can make, we use permutations. Using the formula for permutations, we arrive at the answer of 437,760 different line-ups.
Explanation:
To find the number of different line-ups a team can make, we need to use the concept of permutations. Since there are 9 positions on a baseball team and 18 players, we can arrange the players in a line-up using the formula for permutations:
P(n, r) = n! / (n-r)!
Where n is the total number of players (18) and r is the number of positions (9). Substituting the values, we get:
P(18, 9) = 18! / (18-9)! = 18!/9! = 437,760.
Therefore, there are 437,760 different line-ups that the team can make.
HELPPPPPPPPPPP Why is the sum of a rational number and an irrational number rational? A. Because the product is always a non- terminating, non- repeating decimal. B. Because the product is always a fraction C. Because the product is always a negative number D. Because the product is always a repeating or a terminating decimal
A rectangular prism has a length of 8 feet, a width of 3 feet, and a height of 5 feet. What is the surface area of the rectangular prism?
surface area = 2(wl +hl+hw)
w=3
l=8
h=5
wl=3*8 =24
hl=5*8 =40
hw=5*3 =15
24+40+15 = 79
2*79 = 158 feet^2
The surface area of the rectangular prism is 158 square feet.
What is surface area?The surface area of any given object is the area or region occupied by the surface of the object.
Formula for finding the surface area of rectangular prism:Surface Area = 2{(h × l) + (h × w) +(l × w)]
Where,
l is the length of the rectangular prism
h is the height of the rectangular prism
w is the width of the rectangular prism
According to the given question
Length of the rectangular prism = 8 feet
width of the rectangular prism = 3feet
height of the rectangular prism = 5 feet.
Therefore,
the surface area of the rectangular prism = 2[(8 × 5)+ ( 5 × 3) + ( 8 × 3)]
surface area of rectangular prism = 2[ 40 +15 +24} = 158 square feet.
Hence, the surface area of the rectangular prism is 158 square feet.
Learn more about the surface area of rectangular prism here:
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How do you solve and graph a piece wise function and state the domain and range?
What is the sum of?
A. S=1.5
B.S=2
C.S=4.5
D.=8
helpppppppppppppppppppppp
Find the derivative of f(x) = (1 + 6x2)(x − x2) in two ways.
What is the common ratio in the sequence -27, 9, -3, 1....?
A. 3
B. -3
C. 1/3
D. -1/3
When 23 is subtracted from 4 times a certain number the result is 4
Write an appropriate direct variation equation if y = 27 when x = 9
Answer: y=3x
Step-by-step explanation:
Which expression is right!!!!!! help me!!!!! Help!!!!
area of a triangle is 1/2 x base x height
c would be the base and x is the height
so 1/2cx is the expression needed
The second term in a geometric sequence is 20. The fourth term in the same sequence is 11.25. What is the common ratio
Solve the inequality. 4(p – 4) > 12
A quadratic equation is shown below:
4x^2 − 12x + 10 = 0
Part A: Describe the solution(s) to the equation by just determining the radicand. Show your work. (5 points)
Part B: Solve 2x^2 − 13x + 21 = 0 by using an appropriate method. Show the steps of your work, and explain why you chose the method used. (5 points)
What is the solution to the equation 1 over 2 n = 8?
n = 4
n = 6
n = 10
n = 16
Brett wants to paint the exterior of his two-story home but does not know what length ladder he should buy. The top of his roof is 29 ft above ground level, and (for safety reasons) the ladder should not be at more than an 80° angle from the ground. How long, rounded up to the nearest foot, is the shortest ladder that Brett should buy?
Answer:
Brett should buy a ladder of minimum 30 ft length.
Step-by-step explanation:
Brett wants to paint his exterior of a double story home.
Height of the roof of the second story from the ground = 29 feet
Maximum angle between the ground and the ladder should be = 80°
Now from the figure,
sin 80° = [tex]\frac{AB}{AC}[/tex]
0.9848 = [tex]\frac{29}{AC}[/tex]
AC = [tex]\frac{29}{0.9848}[/tex]
AC = 29.45
≈ 30 ft
Therefore, Brett should buy a ladder of minimum 30 ft length.
Write an algebraic equation for the following. The product of three and a squared number is twice the sum of the number and four.
If f(x) = -2[x] + 8, what is f(-1.8) (PLS HELP ASAP)
Answer:
option c)10
Step-by-step explanation:
Given is a least integer function as
[tex]f(x) =-2[x]+8[/tex]
We are to find out the function value when x = -1.8
Substitute for x the value -1.8
we have
[tex]f(x) =-2[-1.8]+8\\[/tex]
-1.8 has the integer -1 to the left of it.
Hence we get
[tex]f(x) =-2[-1]+8=10[/tex]
Hence answer is option c)10
Using the given zero, 2 - 4i, find one other zero of f(x) = x4 - 4x3 + 21x2 - 4x + 20
The conjugate of the given zero 2 - 4i is 2 + 4i, which must also be a zero of the polynomial f(x) due to the Complex Conjugate Root Theorem.
Given the zero 2 - 4i of the polynomial function f(x) = [tex]x^4 - 4x^3 + 21x^2 - 4x + 20,[/tex] we know by the Complex Conjugate Root Theorem that if a polynomial has real coefficients, then any complex zeros must occur in conjugate pairs. Therefore, the conjugate of 2 - 4i, which is 2 + 4i, must also be a zero of the polynomial function.
As a result, the polynomial can be factored to include the factors (x - (2 - 4i)) and (x - (2 + 4i)). When these factors are multiplied out, they will give you a quadratic factor of the polynomial, which when multiplied with the remaining factors, will result in the original polynomial f(x). The two factors, when multiplied together, yield a quadratic with real coefficients, which means any remaining zeros must also satisfy this quadratic equation.
Which mathematical statement represents “17 more than a number is 26”?
17 + x = 26
17 +n = 26
n + 17 = 26
something like those, you didn't give options to choose from.
Answer:
x + 17 = 26
Step-by-step explanation:
mathematical statement represents “17 more than a number is 26”
Let x be the unknown number
17 more means we add 17 with the unknown number x
so it becomes x+17
'is' represents an = sign
So the equation for the mathematical statement “17 more than a number is 26” becomes x + 17 = 26