Answer: 
Step-by-step explanation:
surface area(SA)= 
= 
= 
=
s= the length of the side of the cube
7/9 = 42/54...when 42/54 reduces, it becomes 7/9...so this is proportional because proportions are nothing but equivalent fractions.
u could also check it this way...
12/21 = 15/24
cross multiply
(21)(15) = (12)(24)
315 = 288.....these do not equal and are therefore, not proportionate
440/4 = 300/3
110 = 100....not equal, so not proportionate
120/5 = 88/4
24 = 22.....not proportionate
66/82 = 99/123
0.804 = 0.804.......these are proportional
68/172 = 43/123
0.395 = 0.349......nope, not proportional
Difference between average temperature and highest recorded = 49.44
Highest - Average = 49.44 Let it be H - A = 49.44
H - (-34.44) = 49.44
H + 34.44 = 49.44
H = 49.44 - 34.44 = 15
Highest recorded = 15°C.
Answer:
True
Step-by-step explanation:
Considering the above definition of Pooled Variance, the correct answer is TRUE.
This is because Pooled variance is used to determine the reasonable estimates of variance, where several repeated tests are expected at each value.
This helps to provide greater precision estimates of variance.
okay so first you wanna turn that 120% into a decimal and the decimal form of that would be 1.2 or 1.20
Secondly you want to multiply 875 by the 1.2
875*1.2 = 1050
So if they sell 120% of last years sales they will sell 1050 cars this year.
Hope this helped :)
