Math

Plz anser all of the question is the grade recovery
1. Convert 8,420 millimeters to centimeter.
842 cm
84.2 cm
8.42 cm
84,200 cm

2. Find the area of a triangle with base b = 17 yd and height h = 11.6 yd.

57.2 yd²
98.6 yd²
192.2 yd²
157.8 yd²

3. Maija is building a square sandbox with sides 3 feet long. She wants to put sand 1.05 feet deep in the box. How much sand should Maija order?

27 ft³
9.45 ft³
3.15 ft³
12.67 ft³

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