Will give brainily rewards 3 questions thats i need help with
1. which terms are synonymouse
a haversian system; osteons
b lacuna;trabeculae
c hematoma; medullary canal
foramen ; hyoid

2 as humans enter old age they all:
a gain weight
b shrink in height
c gain muscle density
d experience muscle straines

3 ribosomes are to the RER as
water towers are to fire fighters
b tires are to car
c gas station are to a highway
d proellers are to a helicopter

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)