Answer:
D) Acceleration is positive and increasing.
Step-by-step explanation:
In formulae, acceleration is defined as the rate of change of velocity per unit time; for example:
where Δ V is the variation of velocity and Δ T is the variation in time.
The graph depicts the velocity of a moving item as a function of time. As we can see ΔV is the increment on the y-axis, while ΔT is the increment on the x axis: therefore, the ratio ΔV/ΔT is the curve's slope. In fact, the slope of the curve in a velocity-time graph corresponds to the object's acceleration. In this graph, we can see that the slope of the curve is growing, which means that the acceleration is positive (since the slope is positive and the velocity is increasing) and increasing (because the slope is increasing).
Answer:
a(4) = -17
Step-by-step explanation:
hello :
use : a(n) =a(n-1) -5
a(n) -a(n-1) = -5 (common differnce for arithmetic sequence)
the ni-eme term is : a(n) = a(1) +(n-1)d d = -5 and a(1) = -2
so : a(n) = -2 +(n-1)(-5)
a(n) = -5n+3
when : n= 4 a(4) = -5(4)+3 =-17
Pete's equation is 50+75h (this means 50+7 times 3 because h represents hours and it tells us that there are 3 hours so h is 3)
paul's equation is 75+50h(this means 75+50 times 3 because h represents hours and it tells us that there are 3 hours so h is 3)
paul charges less because 75+50h equals to 225 and 20+75h equals to 275 and 275 is more than 225 so paul charges less(paul is cheaper)
There is 24 hours a day with 7 days a week which equals 168 hours total in a week. You will subtract 168 from 40 which will equal 128 hours left.
24 x 7 = 168
168 - 40 = 128
Answer: 128