Answer:
1.5 minutes.
Step-by-step explanation:
The relative speed at which the car behind travels compared to the other car is 90 - 70 = 20 km/hr.
The time taken to travel 500 m ( =0.5 km) is 0.5 / 20 = 0.025 hours.
= 0.025 * 60 = 1.5 minutes.
Answer:
26
Step-by-step explanation:
The sum of angles in a triangle is 180 degrees, use this and set up an equation;
x + ( 4x -5 ) + 55 = 180
Simplify
x + ( 4x - 5 ) + 55 = 180
5x + 50 = 180
Inverse operations;
5x + 50 = 180
-50 - 50
5x = 130
/5 /5
x = 26
Answer:
2 m/s
Step-by-step explanation:
Since speed is total distance over time, we first need to find the total distance the car traveled.
Total distance = 200 + 80 + 120 = 400 m
total time = 200 sec
speed = distance/time = 400/200 = 2 m/s
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Answer:
Step-by-step explanation:
is 50
360-230=130
180-130=50
The statement which best compare the mold growth rates is: C. the mold growth rate of the banana bread was half the mold growth rate of the whole wheat bread.
<h3>How to compare the mold growth rates?</h3>
First of all, we would determine area of mold growth B(t) on the piece of banana bread by using this equation:
B(t) = 20(1.06)^t
At t = 1, we have:
B(t) = 20(1.06)^1
B(t) = 21.2 mm².
At t = 2, we have:
B(t) = 20(1.06)^2
B(t) = 22.47 mm².
At t = 3, we have:
B(t) = 20(1.06)^3
B(t) = 23.82 mm².
At t = 4, we have:
B(t) = 20(1.06)^4
B(t) = 25.25 mm².
Now, we can compare the mold growth rates by using this expression:
B(t) = xW(t)
x = B(t)/W(t)
x = 21.2/40.8
x = 0.5.
At t = 2, we have:
x = 22.47/41.62
x = 0.5.
At t = 3, we have:
x = 23.82/42.45
x = 0.5.
At t = 4, we have:
x = 43.30/25.5
x = 0.5.
Read more on growth rate here: brainly.com/question/9479649
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