princesincer6630
23.06.2019 •
Mathematics
Phyllis is training for a marothon and wants to keep track of how far she runs each week. this week she ran 3 1/4 miles . she ran 2/3 of them on saturday . how many miles did the phyllis run on saturday? estimate the answer
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Ответ:
12.17secs
Step-by-step explanation:
Given the equation that models the height as y=-16x^2+187x+93
The rocket will hit the groung at y = 0
The equation becomes;
0 =-16x^2+187x+93
16x^2-187x-93 = 0
Factorize
x = 187±√187²-4(16)(-93)/2(16)
x = 187±√34,969+5952/32
x = 187±√40,921/32
x = 187±202.29/32
x = 187+202.29/32
x = 389.29/32
x = 12.17secs
Hence the required time that t will take is 12.17secs