A bullet is shot upwards with an initial velocity of \( 100 ft / sec \) from a point \( 20 ft \) above the ground, and its height above the ground at time \( t \) is given by \( h ( t ) = - 25 t ^ { 2 } + 100 t + 20\)
i. How high will the bullet go?
ii. How long will it take the bullet to reach the highest point?
8ft, t=0.4
Joe earns \( \$ 9 \) per hour. He worked \( x \) hours on both Wednesday and Friday, and \( 8 \) hours on both Tuesday and Saturday. Write an expression to represent how much Joe earned.
If a virus spreads at a rate that can be modeled by the exponential function \( A ( t ) = ae ^ { r t } \) , how many people will be infected after \( 5 \) days if initially \( 3 \) people are infected and the growth rate is \( 40 \% \) ?
