nathangirnet
19.11.2019 •
Mathematics
Find principal amount at 5.6% for 4 years totaling 145.60
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Ответ:
$118.95
Step-by-step explanation:
Assuming simple increase:
Use the equation for amount for simple interest
A = P(1 + rt)
A is the total at the end of the time period.
r is the rate of interest in decimal form.
t is the time period length.
P is the principal amount.
Substitute values we know into the equation
5.6% in decimal form is 0.056
A = P(1 + rt)
145.60 = P(1 + (0.056)(4))
Simplify
145.60 = P(1.224)
Isolate P
P = 145.60/1.224
P ≈ 118.95 (Not equal because rounded to 2 decimal places)
The principal amount is $118.95.
Ответ:
Step-by-step explanation:
a=-4
a=-2
(a-(-4)(a-2)
(a+4)(a-2)
aa-2a+4a-8
a2-2a-8