For question number 1:The plot H = H(t) is the parabola and it reaches its maximum in the moment when exactly at midpoint between the roots t = 0 and t = 23. At that moment t = 23/2 or 11.5 seconds.
For question number 2:To find the maximal height, just simply substitute t = 11.5 into the quadratic equation. The answer would be 22.9.
For question number 3:H(t) = 0, or, which is the same as -16t^2 + 368t = 0.Factor the left side to get -16*t*(t - 23) = 0.t = 0, relates to the very start of the process, when the ash started its way up.The other root is t = 23 seconds, and it is precisely the time moment when the bit of ash will go back to the ground.
Answer:
A.
Twice the sum of a number and three means that the number and three are in parentheses.
Answer:
141,900
Step-by-step explanation:
I used the calculator :)
Answer:
1st option
Step-by-step explanation:
since the triangles are similar then the ratios of corresponding sides are in proportion , that is
= ( cross- multiply )
AB × AY = AX × AC ( divide both sides by AY )
AB = AX times AC over AY