Answer: y=25
Step-by-step explanation:
The keyword in the question is "maximum", this tells you that you are looking for the vertex,(turning point of the graph, the highest point of the of the parabola). Since they are asking for the maximum height, and "t" represents seconds, you must find the "y" value.
Standard quadratic form is:
ax^2+bx+c
Use the vertex formula:
x=-b/2a
to find the "x" value of the vertex, then plug that value into the original equation as a substitute for "x".
Given y= 40t-16t^2
a=16, b=40
x=-40/2(-16)
x= 5/4 (or 1.25)
So,
y= 40(1.25) - 16(1.25)^2
y = 25
To answer this question we need to figure out toe things: what is 36.5*2 and what is 36.5/4
36.5*2=73
36.5/4=9.12
Add these together for a total of 82.12 in 2.25 years
Answer:
Step-by-step explanation:
B & D are correct.
It will take 22.5 min cause 25 divided by 100 wuld be 4 wich then divide 90 with
Answer:
(x + y)1 - a)
Step-by-step explanation:
x + y - ax - ay
= x - ax + y - ay
= x(1 - a) + y(1 - a)
= (x + y)1 - a)
