Answer:
Third and fourth statement are true ("There are 7 unit cubes..." and "The volume of the prism can be found by 12x3..."). The rest are untrue.
Step-by-step explanation:
No.Middle layer has (2+3) five cubes, not seven.
No. Bottom layer has (2+3+4) nine cubes, the middle layer has five and the top has two. In total, this is sixteen cubes, not nine.
Yes. You can see 9 cubes and there are 16 total, so yes, seven are hidden from view.
Yes. Volume can also be found by multiplying length by width by depth, which is 4x3x3=12x3=36.
No. The volume of the prism is 36. There are 16 cubes. 16 is not half of 36.
Let S be the amount in a savings account.
Let m be the number of months.
General equation
S = 132 + 27m
Specific question
July is the 7th month of the year including both January and July.
S = 132 + 7*27
S = 132 + 189
S = 321
Reasonableness?
Good question. You could estimate an answer.
Start with 150 dollars and say that you add 25 a month.
7 * 25 = 175
S = 150 + 175 = 325 All of this was done in my head. Since the exact answer obtained using the formula is 321, I think that's pretty reasonable using my estimate is a guide.
Answer:
$6,000
Step-by-step explanation:
The mean value of a sample is assumed to be the same as the mean of the population. The mean of a uniformly distributed variable between 0 and 160 is:
If the mean cost for each machine is $80, the mean aggregate cost for a sample of 75 machines is:
The mean aggregate maintenance cost is $6,000.
Answer:
[x-3] [x+4]
Step-by-step explanation:
You look to see if you spot the appropriate factors strait away. If you can not immediately determine them you have to consider all of the potential ones and reason out which ones work.
Answer:
The second one.
Step-by-step explanation:
The pattern is red with 0 arrows, blue with 1 arrow, red with 2 arrows, so it would be blue with 3 arrows.