Answer:33mph
Step-by-step explanation:
the speed decrease by 40%
Therefore, (100-40)%*55miles/h
60%*55
0.6*55
33mph
Answer:
by multiplying $2.52 by 4
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
For this type of problem, we need to think of it as a ratio.
The first tree to shadow ratio would be 40:12 this can be simplified to 20:6 which can be simplified to 10:3.
The second ratio is 5:x. I say x because it's an unknown number. Since 5 is half of ten, then the x would be half of three. Therefore the answer is D.
2,765 divided by 9 is 307.2- reapeted decimal
Answer:
(A)
![(t_0,P_0)=(0,900)](https://tex.z-dn.net/?f=%28t_0%2CP_0%29%3D%280%2C900%29)
![(t_1,P_1)=(3,1500)](https://tex.z-dn.net/?f=%28t_1%2CP_1%29%3D%283%2C1500%29)
(B)
![m=200](https://tex.z-dn.net/?f=m%3D200)
(C)
![P=200t+900](https://tex.z-dn.net/?f=P%3D200t%2B900)
(D)
The high school's enrollment in 2017 is 2500
Step-by-step explanation:
Let's assume time starts since 2009
so, In 2009 , t=0
P=900
In 2012,
t=2012-2009=3
P=1500
(A)
So, we have points as
![(t_0,P_0)=(0,900)](https://tex.z-dn.net/?f=%28t_0%2CP_0%29%3D%280%2C900%29)
![(t_1,P_1)=(3,1500)](https://tex.z-dn.net/?f=%28t_1%2CP_1%29%3D%283%2C1500%29)
(B)
we can use slope formula
![m=\frac{P_2-P_2}{t_2-t_1}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7BP_2-P_2%7D%7Bt_2-t_1%7D)
we can plug values
![m=\frac{1500-900}{3-0}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B1500-900%7D%7B3-0%7D)
![m=200](https://tex.z-dn.net/?f=m%3D200)
we know that
slope is rate of change of P with respect to time
so, slope means increase in population is 200 per year
(C)
we can use point slope form of line
![y-y_1=m(x-x_1)](https://tex.z-dn.net/?f=y-y_1%3Dm%28x-x_1%29)
![m=200](https://tex.z-dn.net/?f=m%3D200)
![(t_0,P_0)=(0,900)](https://tex.z-dn.net/?f=%28t_0%2CP_0%29%3D%280%2C900%29)
![P-900=200(t-0)](https://tex.z-dn.net/?f=P-900%3D200%28t-0%29)
![P=200t+900](https://tex.z-dn.net/?f=P%3D200t%2B900)
(D)
In 2017 ,
t=2017-2009=8
we can plug t=8
and we get
![P=200(8)+900](https://tex.z-dn.net/?f=P%3D200%288%29%2B900)
![P=2500](https://tex.z-dn.net/?f=P%3D2500)
The high school's enrollment in 2017 is 2500