1. Carlos is trying to read 12 pages of his book a night. The book has 156 pages. How many days, d, will it
2 answers:
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Answer:
Calvin will paint the entire area in 92 minutes or 1 hour 32 minutes.
Step-by-step explanation:
First of all we know that the total surface are that Calvin is painting is 115 square feet.
The rate at which Calvin is painting refers to the surface area he covers every 2 minutes. This is 2.5 square feet every 2 minutes.
we can set up a relation to solve this problem
If Calvin paints in 2 minutes
He will paint in
minutes
By cross multiplying, we have
Hence Calvin will paint the entire area in 92 minutes or 1 hour 32 minutes.
For this case we have the following equation:
We must clear the variable "x":
We multiply by 2 on both sides of the equation:
We divide by h on both sides of the equation:
We subtract "a" on both sides of the equation:
Answer:
Answer:
Let the growth function that shows the population in millions after x years,
Where,
= initial population,
r = growth rate per year,
Suppose the population is estimated since 1950,
Thus, if x = 0, P = 2560,
Now, if x = 10 ( that is, on 1960 ), P = 3040,
Hence, the required function that shows the population after x years,
If x = 42,
The population in 1992 would be,
if x = 80,
The population in 2030 would be,