Answer:
75
Step-by-step explanation:
for every 5 boys there are 4 girls
60 / 4 = 15
15 * 5 = 75
Answer:
Check Explanation
Step-by-step explanation:
Normally the mean mileage for the 36 cars without the additive is 25 miles per gallon of gas with a standard deviation of 2.4 mpg
With the additive, the mileage improves to 25.8 mpg.
The sample mean without additive is 25 mpg
The standard deviation of the distribution of sample means for mileage without additive = σₓ = (σ/√n)
where σ = normal standard deviation = 2.4 mpg
n = Sample size = 36
σₓ = (σ/√n) = (2.4/√36)
σₓ = 0.4 mpg
So, a normal distribution of sample means for mileage without gas should have 95% of the possible values between 2 standard deviations of the mean. That is, within 24.2 mpg and 25.8 mpg.
Therefore, a mileage of 25.8 mpg with the additive added cannot point at a significant effectiveness of the additive as this data has shown that 25.8 mpg is within the possible values for sample means for mileage without the use of additives.
Although, it does point at an improved performance with the additive because a sample mean of 25.8 mpg without the additive is on the outskirts of possible sample mean values.
Hope this Helps!!!
This is simple conversion.
Start from getting the numbers of hours.
12 weeks × 5 days × 45 minutes will get the number of minutes spent total (2700mins). Divide this by 60 min to get the number of hours spent total - 45 Hours.
to get the rate - r=laps/time
1800laps/45 hours
rate = 40laps/hour
<span>A mathematical sentence that contains one or more variables is sometimes called an open sentence.</span>
Answer:
8.84 ×10⁻¹
Step-by-step explanation:
Move one decimal to the right to make one number go after the decimal. (ONLY one number from 0 - 9)
0.884 to 08.84
Now with how many times the decimal moves, it determines the power. Left equals positive and right is negative.
Standard form goes with × 10ˣ
the x next to 10 is the power.
The decimal moved 1 right so the power would be -1.
So,
8.84 × 10⁻¹
