Answer:
Step-by-step explanation:
y=5+2(3+4x) - Multiply parenthesis by 2
0=5+6+8x - Add the numbers
0=11+8x - Move variable to left
-8x=11 - Divide both sides by -8
x=-1.375
Volume of cylinder = πr²h
Volume = 3.14 x 4² x 20
Volume = 1,004.8 m³
When the tank is 60% full, the volume is:
0.6 x 1004.8
= 602.88 m³ of water
Answer:
116
Step-by-step explanation:
zinc : copper
4 : 11
11 = 319
zinc = 4 / 11 * 319
Zinc = 116
Answer:
The formula of a surface area of a cone:
SA=pi rl+\pi r^2SA=pirl+πr
2
r - radius
l - slant height
We have the diameter d = 6 in and a slant height l = 8 in.
d=2r\to r=6in:2=3ind=2r→r=6in:2=3in
Substitute:
SA=\pi(3)(8)+\pi(3^2)=24\pi+9\pi=\boxed{33\pi\ in^2}SA=π(3)(8)+π(3
2
)=24π+9π=
33π in
2
Answer:
Mr. Chang got the better deal.
Step-by-step explanation:
Robertson: He paid 100% - 20% = 80% of the cost of the book.
80% * 29.99 = 80/100 * 29.99 = 2399.2/100 = 23.992
Chang: He paid 10% off $25.00
10% of $25.00 = 2.50 dollars. I'll let you go through the steps to get this.
With the discount, Mr. Chang paid 25.00 - 2.50 = 22.50
Conclusion
Mr. Chang got the better deal by $1.49