A golfer hits a ball from a starting elevation of 7 feet with a velocity of 70 feet per second down to a green

with an elevation of -2 feet. The number of seconds t it takes the ball to hit the green can be represented

by the equation - 16t2 + 70t +7=-2. How long does it take the ball to land on the green?

It takes the ball ___

seconds to land on the green.

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.

but which class are u may know that first

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: