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guapka [62]
3 years ago
9

Pete borrowed $400 for 1 year. He paid back a total of $440. What was the interest rate per year?

Mathematics
2 answers:
Katen [24]3 years ago
7 0

Answer:

$40

Step-by-step explanation:

find Y

$400=x

$440=x+y

x+$40=x+y

$40=y

OleMash [197]3 years ago
5 0

I=PRT/100

1. Make R (rate) subject

R/100= I/PT

2. Substitute and calculate

r/100= i/pt

r/100= 40/400 × 1

(<em>4</em><em>0</em><em> </em><em>i</em><em>s</em><em> </em>from 440-400.<em>T</em><em>h</em><em>e</em><em> </em><em>i</em><em>n</em><em>t</em><em>e</em><em>r</em><em>e</em><em>s</em><em>t</em>)

r/100= 0.1

r/100×100= 0.1×100

r=10% (interest rate per year)

To confirm

I=PRT

I= 400×10/100×1

I= $40 (Interest)

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You roll two fair dice, one green and one red. (a) Are the outcomes on the dice independent? Yes No (b) Find P(1 on green die an
navik [9.2K]

Answer:

1) yes ; 2) 1/36 ; 3) 1/36 ; 4) 1/18

Step-by-step explanation:

Given the following :

Two fair dice : 1 green ; 1 red

A) Are the outcomes on the dice independent:

Yes, becomes the outcome of the green dice does not have any effect on the outcome of the red dice.

B) Find P(1 on green die and 5 on red die).

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P(1 on green die and 5 on red die) :

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P(5 on green) = 1/6

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Find P(5 on green die and 1 on red die):

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The answer is: 0.24 x 100 = 24%
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3 years ago
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