$29.40 ........ 40x0.3=12....... 40-12=28...... 28x1.05= $29.40
Step-by-step explanation:
Volume= [(20+20) x (20+20) x 100] - (20 x 20 x 100)
=120000cm^3
surface area= 2 x 40 x 100 + 2 x (40 x 40 - 20 x 20) + 4 x 20 x 100
=18400cm^2
Answer:
b = 125
Step-by-step explanation:
Given a varies directly as ![\sqrt[3]{b}](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7Bb%7D)
then the equation relating them is
a = k ← k is the constant of variation
To find k use the condition a = 3 , b = 64 , then
3 = k![\sqrt[3]{64}](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B64%7D)
= 4k ( divide both sides by 4 )
= k
a = ← equation of variation
When a = 
, then
= ( multiply both sides by 4 to clear the fractions )
15 = 3 ( divide both sides by 3 )
5 = , then
b = 5³ = 125
Answer:
B. -8
Step-by-step explanation:
x-3y=136
18x+3y=-288
add the equations
19x=-152
divide by 19
x=-8
