Set h to 640 and solve for t:
640 = -490t^2 + 1120t
Subtract 640 from both sides:
-490t^2 + 1120t - 640 = 0
The formula to solve a quadratic equation is:
x = -b -/+ sqrtroot (b^2-4ac)/(2a) where a = -490, b = 1120 and c = -640
Solve:
x = -1120 -/+ sqrtroot (1120^2-4(-490)(-640) )/ 2(-490)
x = 8/7 = 1.1428 = 1.14
Time was 1.14 seconds
Step-by-step explanation:
2A=h(a+b)
2A=ha+hb
2A-hb=ha
2A-hb/h=a
Answer:
1/8
Step-by-step explanation:
Hi there!
To divided fractions, you must flip the second fraction and multiply instead.
For example,
1/4 divided by 2 is the same thing as 1/4 x 1/2.
You then multiple straight across to get 1/8.
Really hope this helps!
2^10 is equal to 1024 (one thousand and twenty four)
