If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? use the equation h = –16t2 + 64t + 4.

a. 2 plus or minus square root of 17 end root over 2

b. quantity of 2 plus or minus square root of 17 all over 2

c. 2 plus or minus 4 square root of 17

d. quantity of 16 plus or minus square root of 17 all over 2

A.

Explanation:

As we know that the position of the ball is related with time given as

now when ball hit the ground then we have

h = 0

so we will have

so here by solving the above equation we have

28. evolution

29. environment, survive, offspring  

explanation:

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force