Will add brainliest
a water tank is being filled with water. before water is pumped in, the water level in the tank is 13 inches high. after 20 minutes, the water level is 52 inches high.

if t represents the time in minutes and h represents the water level, which of the following equations can be used to model this situation?
a. h= 39+13t
b. h=1.95t-13
c. h=1.95t+13

Find the arc length parameter along the given curve from the point where tequals=0 by evaluating the integral s(t)equals=integral from 0 to t startabsolutevalue bold v left parenthesis tau right parenthesis endabsolutevalue d tau∫0tv(τ) dτ. then find the length of the indicated portion of the curve r(t)equals=1010cosine tcost iplus+1010sine tsint jplus+88t k, where 0less than or equals≤tless than or equals≤startfraction pi over 3 endfraction π 3.

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*