This is exponential growth/decay type problem...
F=Ir^t, F=final value, I=initial value, r=rate, t=time, in this case I=1250 and r=(1-.045)=0.955 so
F=1250(.955)^t and we want to find t for when F=800
800=1250(.955)^t
.64=.955^t take the natural log of both sides...
ln.64=t ln.955
t=(ln.64)/ln.995
t≈9.69 weeks
t≈9.69 weeks (to nearest hundredth of a week)
Yes she got her money back. To be exact she made a profit of $6.84!
2.58+2.58=5.16 This is how much she has to make to make a profit.
0.75*16=12
She made $12 in total :]
2) y=mx+b
y=-1/2x-2
b=-2 & m= -1/2 down negative one, right two (+)
#1
(-2,0)(0,1)
slope = (1-0)/(0+2) = 1/2
passing point (3,5)
y = mx + b
5 = 1/2(3) + b
5 = 3/2 + b
5 - 3/2 = b
7/2 = b or b = 7/2
equation
y = 1/2x + 7/2
Answer:
-32°F
Step-by-step explanation:
8°F - 40°F
=> 32°F
