Answer:
0.448 seconds
Step-by-step explanation:
d = -16t² -4t + 412
find t when d = 407
substituting d = 407 into the equation:
407 = -16t² -4t + 412 (subtract 407 from both sides)
-16t² -4t + 412 - 407 = 0
-16t² -4t + 5 = 0 (multiply both sides by -1)
16t² + 4t - 5 = 0
solving using your method of choice (i.e completing the square or using the quadratic equation), you will end up with
t = (-1/8) (1 + √21)= -0.70 seconds (not possible because time cannot be negative)
or
t = (-1/8) (1 -√21) = 0.448 seconds (answer)
Answer:
17
Step-by-step explanation:
I don't know the explanation, but hoped this helped.
Answer:
Step-by-step explanation:
1) v= 1/3 ab ×h
v= 1/3 (10)(10)×√13²-5²
v= 400 ft²
-------------------
2) v= πr² h/3
v= 1/3 × π×(6)²×29
v= 1/3×π×12×29
v= 348π
v= 1093.27
≈1093.3
---------------
hope it helps...
have a great day!!
Answer:
d
Step-by-step explanation:
I got it right on the test
Answer:
X= 41
Step-by-step explanation:
