Answer:
D) 7(5x-1)
Step-by-step explanation:
35x -7
7*5x -7*1
7(5x-1)
According to the question
N=Starting population 400
I=annual population increase 4
R= annual growth rate =?
Applying a formula:-
I=Rn
So,4=r×400
r= 4/400
=0.01
2(p+w)=240
p+w=120
w=120-p, we will use this value for w below...
2(p-w)=210
p-w=105, now use the w from earlier...
p-120+p=105
2p-120=105
2p=225
p=112.5 mph (and wind is 7.5 mph)
75 %
Because if 10 is half and 5 is half of 10 its 75%
4+1 = 1+4
\ / \ /
5 = 5
idk tho sorry if its wrong :(