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Norma-Jean [14]
3 years ago
8

A man earns $112 interest in one year on an investment of $1,400. What was his rate of interest?

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
4 0
His rate of interest is 8%
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Kevin is 3 years older than brendon two years ago Kevin was 4 times as old as brendon . How old is Kevin now
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Answer:

  Kevin is 6

Step-by-step explanation:

Let k represent Kevin's age now. Then Brendon's age now is (k-3). Two years ago the relationship of their ages was ...

  k-2 = 4((k-3) -2)

  k -2 = 4k -20 . . . . . eliminate parentheses, collect terms

  3k = 18 . . . . . . . . . . add 20-k

  k = 6 . . . . . . . . . . . . divide by 3

Kevin is 6 now.

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2 years ago
A code is formed using four of these letters: A, B, I, K, N, O, and T. (Note that the order of the letters in the code matters;
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For the next questions, there are 3 vowels for as the first letter, only 6 letters are available for the second, 5 on the next, and 4 on the last. Multiplying these numbers give 360. To solve for probability, divide this number with the sample space. Thus, the answer is 3/7. 
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3 years ago
Ruiz needs to buy a countertop for a kitchen. He calculated the area to be 16 square feet. The actual area is 15.4 square feet.
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First, subtract the two values:

16 - 15.4 = 0.6

Now divide this to the actual area:

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2 years ago
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In this case, since events E and F are mutually exclusive, therefore the probability that either E or F will occur will simply be the sum of two events.

P (E or F) = P (E) + P (F)

P (E or F) = 0.25 + 0.51

P (E or F) = 0.76

 

Therefore this means that there is a 76% probability that either E or F will occur.

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3 years ago
What is the smallest number of degrees needed to rotate a regular pentagon around it's center onto itself ?
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The smallest degree that you can rotate a pentagon is 36 degrees
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