The formula is

We have:


Substituting these values into the formula, we have


⇒ divide each term by 16

⇒ find the pair of numbers that multiply to give 4 and sum gives -5 which is -1 and -4

⇒ We have two values of t

⇒


⇒

The time when the projectile reached 64 feet is at t=1 and t=4
In order to have the variable by itself you have to add 20 to both sides. So your answer would be a=b+20. I hope this helps love! :)
1. First do 18,000 times .20 to get 3,600. Next minus 18,000 by 3,600 and you get $14,400 which is the answer.
2. First do 125 times .15 to get 18.75. Next minus 125 minus 18.75 to get 106.25. Then you do 106.25 times .05 to get 5.31. Finally, add 5.31 to to 106.25 and you get $111.56.
3. 17/39 as a decimal is .4358
4. First you do 45 times .06 to get 2.7. Finally you add 2.7 back onto 45 to get $47.7
5. true (i’m 99% sure on this question)
hope dis helped