Answer:
John has $21.
Step-by-step explanation:
Let John's "wealth" be w. Then 2w+8 = 50, or 2w = 42, or w = 21.
John has $21. Eight more than twice this is 42+8 = 50, as expected.
Answer:
2:3
Step-by-step explanation:
<u>First convert years to months: 3 years = 36</u>
24:36
<u>Then simplify the ratio</u>
24:36
24/2:36/2
12/2:18/2
6/3:9/3
2:3
Answer: 2:3
Answer:
Answer:
B
Step-by-step explanation:
Answer:
First question D
Second question C
Step-by-step explanation:
First question:
You lose 10 (-10), then lose 5(-5)
-10 - 5 = -15
Second:
-3 - 4 - 3= -10
Answer:
Number of year = 11.725 year (Approx.)
Step-by-step explanation:
Given:
Amount invested = $200
Interest rate = 6% (compounded semi annually)
Future value = 2 x Amount invested
Find:
Number of year
Commutation:
Future value = 2 x Amount invested
Future value = 2 x 200
Future value = $400
Number of year (Semi-annual) = 2n
Interest rate (Semi-annual) = 6% / 2 = 3%
So.
A = P[1+r]ⁿ
400 = 200[1+3%]²ⁿ
2 = [1.03]²ⁿ
n = 11.725 year
Number of year = 11.725 year (Approx.)
