You will use the formula to calculate simple interest for each period of time and then subtract the two amounts to find how much Ward will save.
I=prt
I = 20000 x 0.025 x 3
I = $1500 over 3 years
I = 20000 x 0.025 x 5
I = $2500 over 5 years
$2500-$1500 = $1000 in savings
now, as far as the second case....well, sine of anything is within the range of -1 or 1, so -1 < sin(A) < 1
now, we have -2 = sin(A), which simply is out of range for a valid sine, so there's no angle with such sine
so, only the first case are the valid angles for A
Answer:
18% decrease
Step-by-step explanation:
- 7,500 - 6,125 = $1,375
- Set up a proportion:
- Cross multiply, then divide: 1375 × 100 = 137500, 137500 ÷ 7500 = 18 1/3
- 18 1/3% rounded = 18%
- It went down, so it is a decrease
I hope this helps!
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