Answer:
2√30 + 30√2
Step-by-step explanation:
(4√3 − 2√5)(3√10 + 5√6) simplify
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- (4√3 − 2√5)(3√10 + 5√6)=
- 12√30 + 20√18 - 6√50 - 10√30=
- 2√30 + 20*3√2 - 6*5√2=
- 2√30 + 30√2
Answer:
After 45.7 years
Step-by-step explanation:
∵ r = 1/2% per year
∵ P0 = $40
∵ Pn = $50
∵ Pn = P0 ( 1 + r/100)^n-1
∵ P0 is initial value , Pn is the value after n years , is the rate
∴ 50 = 40 (1 + 0.5/100)^n-1
∴ 50/40 = (1.005)^n-1
∴ 1.25 = (1.005)^n-1 ⇒ insert ln in both sides
∴ ln(1.25) = (n-1)ln(1.005)
∴ n - 1 = ln(1.25)/ln(1.005)
∴ n = ln(1.25)/ln(1.005) + 1 = 45.7 years
"In Store A, a book that regularly sells for $24.99 is on sale at 15% off. In Store B the same book regularly sells for $27.99 and is on sale at 25% off. Which store sells the book for the lower sale price?"
"the choises are A Store A; Store A’s sale price is $18.74 and Store B’s sale price is $23.79. B Store A; Store A’s sale price is $18.74 and Store B’s sale price is $20.99. C Store B; Store A’s sale price is $21.24 and Store B’s sale price is $20.99. D Store B; Store A’s sale price is $21.24 and Store B’s sale price is $23.79."
15% of 24.99 is 3.7485.
24.99 - 3.7485 = 21.2415
25% of 27.99 is 6.9975
27.99 - 6.9975 = 20.9925
<u>Store B/ Answer C</u>
Answer:
x = 40
Step-by-step explanation:
1/2x - 18 = 2
1/2x = 2 + 18
1/2x = 20
x = 20 / 1/2
x = 20 * 2/1
x = 40