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sasho [114]
2 years ago
7

How far will a wheel of radius 7 cm travel in two revolutions

Mathematics
1 answer:
Svetllana [295]2 years ago
5 0

Answer:

  • 87.92 cm

Step-by-step explanation:

<u>The travel is 2 circumferences:</u>

  • 2C = 2*2πr = 4πr = 4*3.14*7 = 87.92 cm
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What happens when y = -f(-x)?
IgorLugansk [536]

Answer:

It's a reflection over the x axis.

Step-by-step explanation:

Idk I googled it.

3 0
3 years ago
The graph of the function P(x) = −0.52x2 + 23x + 92 is shown. The function models the profits, P, in thousands of dollars for a
elena-14-01-66 [18.8K]

Answer:

6.84 ≤ x ≤ 37.39

Step-by-step explanation:

we have

P(x)=-0.5x^2+23x+92 -----> equation A

we know that

The company wants to keep its profits at or above $225,000,

so

PXx)\geq 225 -----> inequality B

Remember that P(x) is in thousands of dollars

Solve the system by graphing

using a graphing tool

The solution is the interval [6.78,39.22]

see the attached figure

therefore

A reasonable constraint for the model is

6.84 ≤ x ≤ 37.39

4 0
3 years ago
Which is the equation of the line with slope 3 that contains point (-1, 5)?
sattari [20]

\bf (\stackrel{x_1}{-1}~,~\stackrel{y_1}{5})~\hspace{10em} slope = m\implies 3 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-5=3[x-(-1)] \\\\\\ y-5=3(x+1)\implies y-5=3x+3\implies y=3x+8

5 0
3 years ago
Kira reasoned that 6 1/4 - 2 3/4 = 4 2/4 because the difference between 6 and 2 is 4 and the difference between 1/4 and 3/4 is 2
xeze [42]
<span>Yes, she is reasoning correct, because:

 6 1/4  and 2 3/4 are mixed fractions and you can substract them as it shown below:

 1. You must substract the fractional parts (</span>which are: 1/4 and 3/4) of the mixed fractions. You can notice that the have the same denominator "4", so you only need write this denominaro and substract the numerators:

 = (1-3)/4=-2/4 

 When you simplify the result, you obtain:

 =-1/2

 Now, you must sum the integer parts:

 6-2=4

 Finally, you obtain:

 4 -1/2
4 0
3 years ago
The volume of a cone-shaped funnel is 603 cubic centimeters. The radius of the funnel is 8 centimeters. Find the height of the f
yarga [219]

Answer: 9

Step-by-step explanation:

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So pi x 8^2 h/3 = 603

H/3 = 2.9991

h = 9 (rounded)

4 0
2 years ago
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