The new perimeter will be 3 times the old perimeter.
Original perimeter:
2(8+7) = 2(15) = 30 yds
New perimeter once they are tripled:
3 x 8 = 24
3 x 7 = 21
2(24+21) = 2(45) = 90 yds
30 x 3 = 90
So 26 π = perimeter, then
26 π = 2 π r; 13 π = π r; 13=r
Surface area of a sphere is 4 times pi timers radius^2
aprox pi=3.14
so surface area=145,000,000
145,000,000=4 times 3.14 times rdaius^2
145,000,000=12.56 times radius^2
divide both sdies by 12.56
11544585.987=r^2
square root both sides
3397.73=radius
round to the hundreds
3397 rounded to the hundreds
3400
the answer is D 3,4000 km
6+w is the answer to thst
5) n - 5 <u>></u> -2
<u> + 5 +5</u>
n <u>></u> 3
6) 3 + x < 7
<u> -3 -3</u>
x < 7
7) -7y <u><</u> 14
<u> ÷ -7 ÷ -7
</u> y <u> <</u> -2<u>
</u>8) b/5 > -1
<u>× 5 × 5</u>
b > -5
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