Aurora S. thought she had found her true love while vacationing in Italy. To symbolize the "locking of their hearts Aurora and her soulmate
placed a lock on the Ponte Milvio Bridge and threw the key into the Tiber
River. The key left her hand 19.8 meters above the water and had an
initial velocity of 15m/sec. How long was the key in flight before it hit the
water? (round to the nearest hundredth)

right

step-by-step explanation:

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.