If Angela earns $6.25 an hour and she is going to work for 9 hours this weekend, you would just multiply 6.25 by 9. The answer is $56.25.
Given:
All the edges of a cube are expanding at a rate of 4 in. per second.
To find:
The rate of change in volume when each edge is 10 in. long.
Solution:
Let a be the edge of the cube.
According to the question, we get


We know that, volume of a cube is

Differentiate with respect to t.


Putting the given values, we get




Therefore, the rate of change in volume 1200 cubic inches per second.
Given that in the jar, navy beans and white beans in a ratio of 1:9. Let the amount of navy beans be
.
Then, the amount of white beans in the jar is
.
Given that amount of navy beans is
.
Total amount of beans in the jar is
.
5.378 E9 = 5.378 × 10⁹ = 5,378,000,000