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find the volume. round to hundredths. 35. diagram of a pyramid with 4\ …

Question

find the volume. round to hundredths.

  1. diagram of a pyramid with 4\ height, 3\ base, 3\ side
  2. diagram of a cone with 7 yd height, 5 yd radius
  3. diagram of a cylinder with 6 radius, 10 height

add or subtract the times.
38.
$\begin{array}{r} 7:18 \\ - 3:05 \\ hline end{array}$
39.
$\begin{array}{r} 2:44 \\ + 1:59 \\ hline end{array}$
40.
$\begin{array}{r} 0136 \\ + 0438 \\ hline end{array}$

Explanation:

Response
Problem 35: Volume of a Pyramid

Step 1: Identify the formula for the volume of a pyramid

The formula for the volume \( V \) of a pyramid is \( V = \frac{1}{3}Bh \), where \( B \) is the area of the base and \( h \) is the height.

Step 2: Calculate the area of the base

The base is a square with side length \( 3 \) inches. The area of a square is \( B = s^2 \), so \( B = 3^2 = 9 \) square inches.

Step 3: Substitute the values into the volume formula

The height \( h \) is \( 4 \) inches. Substituting \( B = 9 \) and \( h = 4 \) into the formula: \( V = \frac{1}{3} \times 9 \times 4 \).

Step 4: Calculate the volume

\( \frac{1}{3} \times 9 = 3 \), then \( 3 \times 4 = 12 \). So the volume is \( 12 \) cubic inches.

Step 1: Identify the formula for the volume of a cone

The formula for the volume \( V \) of a cone is \( V = \frac{1}{3}\pi r^2 h \), where \( r \) is the radius and \( h \) is the height.

Step 2: Substitute the values into the formula

The radius \( r = 5 \) yards and the height \( h = 7 \) yards. Substituting these values: \( V = \frac{1}{3} \times \pi \times 5^2 \times 7 \).

Step 3: Calculate the volume

First, calculate \( 5^2 = 25 \). Then, \( \frac{1}{3} \times \pi \times 25 \times 7 = \frac{175\pi}{3} \approx \frac{175 \times 3.1416}{3} \approx \frac{549.78}{3} \approx 183.26 \).

Step 1: Identify the formula for the volume of a cylinder

The formula for the volume \( V \) of a cylinder is \( V = \pi r^2 h \), where \( r \) is the radius and \( h \) is the height.

Step 2: Substitute the values into the formula

The radius \( r = 6 \) feet and the height \( h = 10 \) feet. Substituting these values: \( V = \pi \times 6^2 \times 10 \).

Step 3: Calculate the volume

First, calculate \( 6^2 = 36 \). Then, \( \pi \times 36 \times 10 = 360\pi \approx 360 \times 3.1416 \approx 1130.97 \).

Answer:

\( 12.00 \) cubic inches

Problem 36: Volume of a Cone