Answer:
2989
Step-by-step explanation:
Always start with the bracket
3000 + 9 = 3009
3009 - 20 = 2989
Answer:
a) 69.5 b)72.1 c)74.7
Step-by-step explanation:
a)Someone born in 1950 has life expectancy=68.2 yrs while 1970=70.8 yrs
to find life expectancy of someone born in 1960 we can interpolate to find the results like this:
(68.2+70.8)/2 =69.5 because 1960 is exactly in between 1950 and 1970
Now we can see the trend like this :
68.2,69.5,70.8 and common difference is 1.3
b) adding 1.3 to 70.8 we can get life expectancy for someone born i 1980 and that is 72.1
c) adding two times 1.3 life expectancy of someone born in 2000 is 74.7 as year gap is 2
Generally it is said that interpolation is more accurate and extrapolation can have errors but in our present case i'm more confident about b and c as the series is simple but it too depends on a to find the accurate common difference so if there is some errror in a we too have error chances in b and c so they are interrelated.
I believe i can help:
the formula for right triangle area:
1/2bh
plug in the numbers that are given:
1/2(15)(8)
simplify:
1/2(120)
60 = triangle area
the formula for a rectangle:
bh
plug in the numbers that are given:
(19)(8)
simplify:
152 = rectangle area
now add the two shape’s areas and you have your final answer!
152 + 60 =
212ft
Answer:
$22.5
Step-by-step explanation:
The original price is $30 and it's on sale for 25% off. Since 25% is a quarter of the total price, I divided 30÷4=7.5. $7.5 is 25% of $30, so 7.5 is the amount taken off the original price. To find what Daysi paid, I subtracted 30-7.5=22.5. $22.5 is the result after the 25% off, so Daysi paid $22.5.
23 and 29 are the two numbers that are prime