Answer:
20 miles
Step-by-step explanation:
d miles × (1 h)/(10 miles) = d/10 hours
d miles × (1 h)/(40 miles) = d/40 hours
d/40 = d/10 - 3/2
d = 4d - 60
d = 20 miles
Answer:
D
Step-by-step explanation:
-2 - 2 = I-4I = 4
Step-by-step explanation:
Start by finding when the populations become equal.
C = R
1000e^(0.1t) = 50e^(0.5t)
Divide both sides by 50.
20e^(0.1t) = e^(0.5t)
Divide both sides by e^(0.1t).
20 = e^(0.4t)
Take natural log of both sides.
ln 20 = 0.4t
Multiply both sides by 2.5
t = 2.5 ln 20
t ≈ 7.5
The population of rabbits first exceeds the population of crickets in the middle of the 7th year after 2016, or 2023.
The sides are in ratio 2:3:4
So this means
shortest side = 2x
medium side = 3x
longest side = 4x
for some number x
The shortest side is given to be 5 cm, meaning that
2x = 5
x = 5/2 <--- divide both sides by 2
x = 2.5
Since x = 2.5, we can now say...
shortest side = 2*x = 2*2.5 = 5
medium side = 3*x = 3*2.5 = 7.5
longest side = 4*x = 4*2.5 = 10
The three sides of the triangle are: 5, 7.5, 10
They add to 5+7.5+10 = 22.5
The perimeter of this triangle is 22.5 centimeters
Isn't it 28? i'm a little confused so i fully don't know but i think you subtracted 10 from 38 and you get 28.
