Translate the given formula to an English phrase using the word "varies".A = ?r2, where A is the area of a circle of radius r.
What will be an ideal response?
The area of a circle varies directly as the square of its radius.
Mathematics
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Solve the problem. 30% of the population of a village has a certain disease. If people in the village are selected successively at random, what is the probability that the 3th person selected is the first person with the disease?
A. 0.147000 B. 0.490000 C. 0.090000 D. 0.063000
Mathematics
Solve the initial value problem.u'(x) = 
- 4, u(0) = 5
A. u = 
tan-1
- 4x - 5
B. u = 
tan-1
+ 4x - 5
C. u = tan-1
- 4x + 5
D. u = 
tan-1
- 4x + 5
Mathematics
Round the number to the specified place.216,191 to the nearest ten
A. 216,290 B. 216,170 C. 216,200 D. 216,190
Mathematics
Clear fractions then solve by substitution.
- 
= -18
+ 
= -9
A. {(-12, 0)} B. {(12, 0)} C. {(x, y)| 3x - y = -108} D. ?
Mathematics