3 years ago

5 points

Mathematics

1 answer:

KIM [24]3 years ago

7 0

Answer: 13

Step-by-step explanation:

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Is 26 a perfect square? Explain your reasoning.

Nady [450]

No, because 2 numbers multiplied by each other will not make 26.

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4 years ago

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I need help with this question

SashulF [63]

Answer:
_______________________________________________
1) 72 $\pi$ cm² / min. ;
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2) 192 $\pi$ cm² / min.
_______________________________________________
Explanation:
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Area of a circle: A = $\pi$ r² ;

Rate of change of Area is: da/dt = 2 $\pi$ r (dr/dt) ;

Given: dr/dt = 3 cm / min.
______________________________________________________
Problem 1)
____________________________________________________________
dA/dt = 2 $\pi$ *(12 cm)*(3 cm/ min) = 72 $\pi$ cm² / min. ;
____________________________________________________________
Problem 2)
____________________________________________________________
dA/dt = 2 $\pi$ *(32 cm)*(3 cm/ min) = 192 $\pi$ cm² / min.
_____________________________________________________________

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3 years ago

Given that BC is a tangent to the circle at B and CD is a tangent to the circle at D and also that the angle DAB is 115, calcula

kotegsom [21]

Step-by-step explanation:

the answer is in the above image