Answer: 2.81 s
Step-by-step explanation:
Given
Ball is kicked upward with velocity 
Height of the ball is given by the function 
Derivative of a function gives the maxima or minima at certain point

Thus, it takes ball 2.81 s to reach the top.
Answer:
Value of expression in single logarithm is
.
Step-by-step explanation:
Given expression is,

Now using logarithmic rule to solve the expression as follows,
Applying product rule of logarithmic,

Therefore,

Applying power rule of logarithmic,

Therefore,


Applying quotient rule of logarithmic,

Therefore,

Simplifying,



Therefore value of expression is 
Answer:
.3%, 21/7000=.003
Step-by-step explanation:
to make it by percent you multipy by 100