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3 years ago

Solve proportion to x:

Mathematics

1 answer:

crimeas [40]3 years ago

3 0

Answer:

Step-by-step explanation:

12/15=4/5

4/5=36/x

cross product

5*36=4*x

180=4x

x=180/4

x=45

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Hey how do you know of can run 1/4 of a mile in 22.5 seconds. At this rate, which equation can be used to determine how fast a h

krok68 [10]

Answer:

Step-by-step explanation:

If its 1 quarter of a mile in 22.5, then we take <em>s, </em>seconds, times 4 which is 90.

SO we cross out A and B, and we're left with C AND D. Now we check the math on them.

.25/22.5 is 0.01111111 (repeating)

and 22.5/.25 is 90!

3 0

3 years ago

The cost of controlling emissions at a firm rises rapidly as the amount of emissions reduced increases. Here is a possible model

Nadusha1986 [10]

Answer:

$\bar C = 4100\,dollars$

Step-by-step explanation:

a) The average value of a function is given by the following integral:

$\bar C = \frac{\int\limits^{q_{max}}_{0} {4100+90\cdot q^{2}} \, dq }{q_{max}}$

$\bar C = \frac{1}{q_{max}}\cdot \left(4100\cdot q_{max} + 30\cdot q_{max}^{3} \right)$

$\bar C = 4100 + 30\cdot q_{max}^{2}$

b) The determination of the minimum average daily cost per pound of pollutant is done by the First Derivative Test and the Second Derivative Test, which is:

$\bar C' = 60\cdot q_{max}$

$60\cdot q_{max} = 0$

$q_{max} = 0$

$\bar C'' = 60$ (absolute minimum).

The level of reduction corresponding to the lowest average daily cost per pound of pollutant is:

$\bar C = 4100\,dollars$

3 0

4 years ago

MIDDLE SCHOOL MATH— 20 POINTS

Dmitry [639]

Answer:

132000 tk

Step-by-step explanation:

=> 220000 × 60%

=> 220000 × 60/100

=> 132000

...........................

Forgive me if wrong

7 0

3 years ago

The balloons for a party cost $37.95. Five people share the cost equally. How much money will each person pay?

Maslowich

37.95/5=7.59$ for each person that will pay for the ballon party

7 0

3 years ago

Read 2 more answers

A shipping company uses the box shown.

ICE Princess25 [194]

Answer:

300 cm^2

Step-by-step explanation:

The volume of the rectangular prism is calculated by multplying lenght to the widht to the height

20*15*10 = 300 cm^2

6 0

3 years ago