Design your own experiment to answer this question: Which fertilizer should I use on the flowers in my garden; Jobes, Scotts, MiracleGro, or Vigoro?
Hypothesis
Materials
Procedures (steps) -
Independent Variable -
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Many Subjects -
Measurable Data (Dependent Variable) -

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

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.