Answer:
The surface area of the cube is 
Step-by-step explanation:
we know that
The length of a diagonal of a cube is equal to

where
b is the length side of a cube
In this problem we have

so

solve for b

Simplify

<em>Find the surface area of the cube</em>
The surface area of the cube is equal to

substitute the value of b

1. Reverse the numerator and denominator of the second fraction and change the division sign to a multiplication sign
2. Multiply the 2 fractions (By multiplying the numerators and the denominators).
3. Simplify is necessary.
Hope this helped!
Answer:
A (painter 1) = 10 hours
B (painter 2) = 15 hours
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
We can figure out the initial value and base of an exponential function if the function is written in the form
where
a is the initial value, and
b is the base
<u>Note:</u> a ≠ 0 and b ≠ 1
Our equation given can be written in this form by writing it like 
Thus, this is an <em>exponential function</em>. The initial value is 1 and the base is 5.
The correct answer is B