Answer:
<u><em>c = 20</em></u>
Step-by-step explanation:
c + 72 = 92
subtract both sides by 72
<u><em>c = 20</em></u>
What is the mean of this data set? If necessy, round your answer to the nearest tenth. 12,16,22,23,34,44,46,47,48,64,67,73,83,88
Dmitry_Shevchenko [17]
The mean for the data set is 50.4
Rounded to the nearest 10th is 50
A half because 8 can go into 16 2 times without leaving a remainder.
Let x = first plane's speed.
We have the equation:
2 hours * x km/h + 1.5 hours * (x+60) km/h = 3135 km.
3.5 hours*x km/h + 90 km = 3135km
3.5hours*x km/h = 3045km
x = 870 km/h.
The first plane is traveling at 870 km/h, therefore since it is 60 km/h faster, the second plane is traveling at 930 km/h.
It would be 10^-7.
When you have a negative number in scientific notation, you count a whole zero and start counting behind the decimal point because a negative number is less than 0. So, it cannot have a value over 0. Though if it was after the decimal, it would be the positive answer because a positive number is higher than 0.
An example would be:
10^-3=0.001
10^3=1000
