For the first digit there are 7 choices. For the second digit there are 6 choices (because we can't use the same one again). And so on, until there is only one choice for the last digit.
The number of possible codes is this:
7*6*5*4*3*2*1 = 7! = 5040
Answer:
Step-by-step explanation:
TU/26=(TU+24)/(26+39)
TU/26=(TU+24)/65
65TU=26TU+624
39TU=624
TU=16
Step-by-step explanation:
One gallon = 25 miles
8 gallon= 25×8 miles= 200 miles
17. (x^2-x+3)(4x+1)
18.(x+2)(x) - (7)(3)
9514 1404 393
Answer:
207.24 in²
Step-by-step explanation:
The "r" in the formula stands for the radius of the cylinder. That is half the diameter, so is 3 in. The "h" in the formula stands for the cylinder height, shown as 8 in. Put these values in the formula and do the arithmetic.
SA = 2πr(r +h) = 2(3.14)(3 in)(3 in + 8 in) = 6.28(33 in²)
SA = 207.24 in²
