ANSWER THESE TWO QUESTIONS FOR ME: 1. If the surface area of a cube is 390 cm², then which best describes the length of the side of the cube?

A. less than 7 cm
B. between 7 cm and 8 cm
C. between 8 cm and 9 cm
D. greater than 9 cm

2. The net below shows equilateral triangles. What is the total surface area of the triangular pyramid in square feet?

sqrt(65) = s

Step-by-step explanation:

The surface area of a cube is found by

SA = 6s^2  where s is the side length

390 = 6 s^2

Divide each side by 6

390/6 = 6s^2 /6

65 = s^2

Take the square root of each side

sqrt(65) = s

65^2

Step-by-step explanation:

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step-by-step explanation:

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168