Answer:25.13
Step-by-step explanation:
use the formulas
C=2πr
d=2r
Answer:
Step-by-step explanation:
Given that an observation from a normally distributed population is considered "unusual" if it is more than 2 standard deviations away from the mean. There are several contaminants that can harm a city's water supply. Nitrate concentrations above 10 ppm (parts per million) are considered a health risk for infants less than six month of age.
We can say 1.59 and 2.52 if taken average would be the mean
Mean = 2.01
The deviations on either side = 2.52-2.01 = 0.41
This can be taken as 2 std dev
So std dev = 0.205
Hence we can take nitrate concentration is normal with mean = 2.01 and std deviation is 0.205
N(2.01, 0.205)
Answer:
Total he earns in 8 2/5 weeks=$680.40
Step-by-step explanation:
Reynolds paints 45 yards in 1 week, the number of yards he paints in 8 2/5 is expressed as= The average number of yards he paints in a week×number of weeks he paints= (8 2/5)×45=(42/5)×45=378 yards
He gets paid $0.60 per foot
1 yard=3 feet
Convert 378 yards to feet= 378×3=1134 feet
Total amount he earns=(Number of feet painted×cost per foot)
Total amount he earns=(1134×0.6)=$680.40
Answer:
a = 72° b = 88°
Step-by-step explanation:
We know in the cyclic quadrilateral opposite angles are supplementary so
a + 108° = 180° { being opposite angles of cyclic quadrilateral }
a = 180° - 108°
a = 72°
b + 92° = 180° { being opposite angles of cyclic quadrilateral }
b = 180° - 92°
b = 88°
Answer: The value of P(E∪F) = 0.64.
Step-by-step explanation:
Since we have given that
P(E) = 0.38
P(F) = 0.38
P(E∩F) = 0.12
So, we need to find the P(E∪F).
As we know the formula for the sets.
Hence,the value of P(E∪F) = 0.64.
