Answer:
3 seconds
Step-by-step explanation:
when h=7 ft
-16t²+49t+4=7
-16t²+49t-3=0
16t²-49t+3=0
16t^2-48t-t+3=0
16t(t-3)-1(t-3)=0
(t-3)(16t-1)=0
t=3,t=1/16
t=1/16 seconds is the time when it just started.
so reqd. time=3 seconds.
Answer:
1st one is yes
Step-by-step explanation:
the other two im not sure about
P=68
P=2L+2(9)
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Therefore:
2L+2(9)=68
2L+18=68
2L=68-18
2L=50
L=50/2
L=25
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So the length is equal to <u>25 inches</u>.
Answer:
10
Step-by-step explanation:
10 squared is 100
Answer:
the third
Step-by-step explanation:
