How would -174.2 be written in scientific notation?
a. -1.742 x 10-2
b. 1/(1.742 x 102
c. -1.742 x 102
d. 1.742 x 10-2

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.