To solve this question:
Suppose you deposit $100 in an account that earns 0.5% each month. You make no withdrawals from the account and deposit no more money into the account. How much money will you have in the account after 4 years?
Do I use A = P(1 + rt) to solve this question? If so, is my answer right:
A = P(1 + rt)
A = 100[1 + (.5 x 48)]
A = 100[1 + 24]
A = 100
A = 2500
Second question: (I don't even know where to begin & I have to show my work!)
A projectile is fired directly upward with amuzzle velocity of 860 feet per second from a height of 7 feet above the ground.
a. Determine a function for the height of the projectile "t" seconds after it's released.
b. How long does it take the projectile to reach a height of 100 feet on its way up?
c. How long is the projectile in the air?
v is initial velocity which is 860 feet per second which is going to be positive since it is going up.
h is initial height which is 7 feet.
g is the decelleration from gravity. Which is 32 feet per second per second.
The obejct reaches 100 feet when s(t)=100 for some value t.
Important. When you solve this using quadradic formula you shall get two values for t. Select the first one because the problem say "..going up...".
That is equivalent to saying amount of time until it comes down.
s(t)=0 for some positive t value.
Apply quadradic formula.