Answer:
First building = 456
Second building = 438
Third building = 383
Step-by-step explanation:
First building = 73 + x
Second building = 55 + x
Third building = x
Total height of three buildings = 1277
(73 + x) + (55 + x) + (x) = 1277
73 + x + 55 + x + x = 1277
128 + x + x + x = 1277
128 + 3x = 1277
3x = 1149
x = 383
This is the height of the third building.
First building = 73 + x = 73 + 383 = 456
Second building = 55 + x = 55 + 383 = 438
Answer:
SA = 2400 cm²
Step-by-step explanation:
SA of a cube = S² x 6 (the number of its faces)
SA = 20² x 6
SA = 400 x 6
SA = 2400 cm²
Answer:
And we can use the z score formula in order to find the deviationn above/below for the limits given given by:
And replacing we got:
So then we want the % of values within 3 deviation from the mean and from the empirical rule we know that between these we have 99.7% of the data.
Step-by-step explanation:
We know that the IQ scores have the following parameters:
And we want to find the following probability:
And we can use the z score formula in order to find the deviationn above/below for the limits given given by:
And replacing we got:
So then we want the % of values within 3 deviation from the mean and from the empirical rule we know that between these we have 99.7% of the data.