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9.2.3 (day2) Understanding Square Root 9-94. Homework

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9.2.3 (day2) Understanding Square Root 9-94. Homework
9.2.3 (day2) Understanding Square Root
Homework
9-94. Daniel needed to paint his patio, so he made a scale drawing of it. He knows that the
width of the patio is 10 feet, but the scale drawing is in
inches.
a. Find x, the length of the patio in feet.
17.5 feet
b. Find the area of the patio so Daniel knows how much area he needs to paint.
175 sq ft
c. One can of paint covers 125 square feet. How many cans of paint will Daniel need to
buy?
2
9-95. Juan found that 20 new pencils weigh 12 ounces. How much will 50 new pencils
weigh? Show your reasoning.
w = 30
9-96. For each diagram below, solve for x. Explain what method you used for each problem.
x = 20º
x = 8º
x = 20º
x = 60º
9-97. Find the surface area and volume of the rectangular prism at the right.
SA = 34 square units, V = 10 cubic units
9-98. Find the area of each circle below.
a.
radius = 8 cm
b.
201.06 cm2
2827.43 cm2
9-99. Write each number in scientific notation.
b. 49.63
4.963 x 101
b. 0.0000005
5 × 10−7
c. 3,120,000,000
3.12 × 109
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