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3 years ago

E varies directly with the square root of C. If E=40 when C=25 find: E when C= 49

Mathematics

2 answers:

Lesechka [4]3 years ago

8 0

Answer:

Step-by-step explanation:

tiny-mole [99]3 years ago

6 0

Answer: E = 56

Step-by-step explanation:

E is proportional to √C

To remove proportionality, introduce a constant (k).

E = k × √C

From question,

E = 40 and C = 25

So,

40 = k ×√25

40 = k × 5

k = 8

Now,

C = 49

k = 8

E = ?

E = k√C

E = 8 × √49

E = 8 × 7

E = 56

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