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3 years ago

10

Plz help me on this I just learned it today!!

2 answers:

anyanavicka [17]3 years ago

6 0

I'll help with one. You have to split the shapes into shapes you know how to find the volume of. Split the first one into two rectangles. The sides of the one on top are 3cm, 4cm, and 10-3cm, since you split it. So 10-3=7. 7*4*3 is 84. Next you find the volume of the lower rectangle. 16cm, 3cm, and 16-3cm are the sides. 16--3 is 13, so 13*4*3 = 156. add both volumes, 86+154 = 240 cm^3 is your answer.

Marysya12 [62]3 years ago

5 0

I can give you the formula to finding volume it would be lxhxw also called length x width x height hope this formula helps

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3 years ago

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2 years ago

Jean drove 70 miles per hour for a total of 420 miles on a trip. She used the equation below to calculate the time, t, it would

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Step-by-step explanation:

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3 years ago

Read 2 more answers

The reference angle for 5pie/4 is pie/4, which has a terminal point (sqr2/2,sqr2/2), what is the terminal point of 5pie/4?

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7 0

2 years ago

The cost of painting a circular traffic sign is $2.50 per square foot how much rounded to the nearest cent will it cost to paint

____ [38]

Answer:

$94.29 (nearest cents)

Step-by-step explanation:

Given:

The cost of painting a circular traffic sign is $2.50 per square foot.

Diameter measures 24 inches.

Question asked:

How much rounded to the nearest cent will it cost to paint the sign?

<u>Solution:</u>

<u>First of all we will calculate the area of circular sign and then its cost:-</u>

Diameter = 24 inches

Radius, r = $\frac{Diameter}{2} =\frac{24}{2} =12\ inches$

$Area\ of\ circle=\pi r^{2}$

$=\frac{22}{7} \times(12)^{2} \\ \\ =\frac{22}{7} \times144\\ \\ =\frac{3168}{7} \\ \\ =452.57\ square\ inches$

<u>By unitary method:</u>

Cost of paint for 1 square foot = $2.50

As we know that 1 foot = 12 inches

Cost of paint for 12 square inches = $2.50

Cost of paint for 1 square inches = $\frac{2.5}{12}$

Cost of paint for 452.57 square inches =

$\frac{2.5}{12}\times452.57=\frac{1131.425}{12} =94.285$

Cost of painting a circular traffic sign will be $94.29 (nearest cents)

7 0

3 years ago