Molly needs to practice her piano piece 27 times before her recital. She can practice the piece 3 times in one hour.

Mathematics

2 answers:

DIA [1.3K]3 years ago

8 0

Answer:

Step-by-step explanation:

Makovka662 [10]3 years ago

8 0

The Answer Is Nine Hours.

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A rectangular box has a square base with an edge length of x cm and a height of h cm. The volume of the box is given by V = x2h

creativ13 [48]

It is given in the question that

A rectangular box has a square base with an edge length of x cm and a height of h cm. The volume of the box is given by

$V = x^2h cm^3$

And the edge length of the base is 12 cm, the edge length of the base is decreasing at a rate of 2 cm/min, the height of the box is 6 cm, and the height is increasing at a rate of 1 cm/min.

Here we differentiate V with respect to t, and we use product rule, that is

$V = 2xh(dx/dt)+ x^2(dh/dt)$