Answer:
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
(4^3)^5=4^(3*5)=4^15
I think you substitute 189 for the letter t.
You actually do substitute.
It belongs to Q, The st of RATIONAL NUMBERS. It's written in terms of set:
1/4 ∈ Q={1/4, I 1∈Z, q∈Z, with q≠0}
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.
