Answer:
C
Step-by-step explanation:
a=r^2
To find the radius, divide the diameter by 2
r=d/2
r=10/2
r=5
a=r^2
a=5^2
a=25
So, choice C is correct
Hope this helps! :)
Can someone give me a answer key for Vocabulary Test Course 1 Chapter 4 Multiply and Divide Fractions
1 answer:
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Answer:
Step-by-step explanation:
We are told that the average human heart beats times per day and there are
days in one year.
To find number of heart beats in one year we will multiply number of heart beats in one day by number of days in one year.
Now we will solve this problem using exponent properties.
Our answer is in scientific notation we can represent it in standard form as times.
Therefore, average human heart beats in one year or 41975000 times.