Step-by-step explanation:
t8 = a1 + (n - 1)*d
t8 = 17
17 = a1 + 7*d
t12 = 25
25 = a1 + 11d
17 = a1 + 7d Subtract
8 = 4d Divide by 4
8/4 = 4d/4
2 = d
17 = a1 + 7d
17 = a1 + 7*2
17 = a1 + 14 Subtract 14
3 = a1
Sum 20 terms
The 20 term = a1 + 19*2
The 20 term = 3 + 38
= 41
Sum = (a1 + a20) * 20 / 2
Sum = (3 + 41)* 20/2
Sum = 44 * 10
Sum = 440
Hi there!
Your answer will be 1.81% decrease.
% Decrease = Decrease* ÷ Original Number × 100
*Decrease = Original Number - New Number
Answer:
He must invest R297 521 today.
Step-by-step explanation:
The compound interest formula is given by:

Where A(t) is the amount of money after t years, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per year and t is the time in years for which the money is invested or borrowed.
Banabas must pay his ex-wife an amount of R350 000 in two years’ time.
This means that 
Interest rate of 8.15% per annum compounded monthly:
This means that
.
Amount he must invest today:
This is P. So




He must invest R297 521 today.
Answer:
We have
n[T]=4+20-x+x+23-x
32=47-x
x=47-32
x=15
so
<u>the number of men questioned who have</u>
<u>the number of men questioned who haveall three </u><u>characteristics</u><u> </u><u>is</u><u> </u><u>1</u><u>5</u><u>.</u>
again
n[S]=6+20-x+x+24-x=50-x=50-15=35
again
we have
n[U]=n[T]+n[s]+N only [ B]
54=32+35+N only [ B]-n[T and S]
N only [ B]=54-67+20=7
<u>who are bald but</u>
<u>who are bald butnot tall a </u><u>slim</u><u> </u><u>is</u><u> </u><u>7</u><u>.</u>
This would be considered a reasonable estimate because if you were to use estimation, you can round 289 to the nearest hundred (300), which is divisible by 60. When dividing 300 / 60, you will get 5 hours, which is 0.5 greater than 4.5 therefore making it a reasonable estimate. In addition, when actually dividing 289 / 60, you will get approximately 4.8 hours, which is close to the estimate, 4.5 hours.