The answer is:
(null hypothesis) u=2.7; Ha(alt hypothesis): u<2.7
Answer:
625 cm³ and 64000 cm³
Step-by-step explanation:
Given
x =
( cube both sides )
x³ = V
(a)
x = 25 cm , then
V = 25³ = 625 cm³
(b)
x = 40 cm , then
V = 40³ = 64 000 cm³
Answer:

Step-by-step explanation:
Given
Represent the number with x.
So:

or

We want to solve for x
Subtract both sides by 2


Solve for x


No other number aside 0, satisfy the property.
I gave steps in the picture how to solve it was much easier to write it out then type it. hope this helps!