The annual interest rate is 6.2%.
Solution:
Given data:
Interest = $310
Principle = $1000
Time = 5 years
To find the annual interest rate:
<u>Simple Interest formula:</u>
Substitute the given values in the formula, we get
Do cross multiplication.
Divide both sides of the equation by 1000, we get
Divide by 5 on both sides of the equation, we get
R = 6.2%
Hence the annual interest rate is 6.2%.
This is the concept of indices. To re-write the question as instructed we proceed as follows:
b^-6×b^11
according to the rules of indices, when we multiply the number which have the same base, we add their powers. In our case this will be:
b^-6×b^11
adding their powers we get:
b^(-6+11)
=b^5
the answer will therefore be b^5
Step 2 was his error.
The following problem is solved by Alan:
In solving for x, you have to cross multiply between the numbers.
In that case, step 2 would look like this:
(25)(x) = (8)(200)
NOT THIS:
(8)(x) = (25)(200)
Now continue all the way.
25x = 1600
x = 1600 ÷ 25
x = 64
Phone card = $20
You need to minus 17.92 from 20 = $2.08
$2.08 / 0.13 = how many minutes
= 16
Answer:
(3y - 7)(9y^2 + 21y + 49)
Step-by-step explanation:
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