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borishaifa [10]
3 years ago
12

For his birthday, Luke got a new drone. According to the box, the drone can fly as fast as 1,100 feet per minute. Luke thinks th

at sounds too fast to be realistic, so he wants to convert the speed to more familiar units, like miles per hour. How many miles could the drone travel in an hour?
Mathematics
1 answer:
Ket [755]3 years ago
6 0

Answer:

12.5 miles per hour

Step-by-step explanation:

1,100 ft/min * (60 min)/(1 hr) * (1 mile)/(5280 ft) = 12.5 miles/hr

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Josiah kept track of how many songs of each genre were played in an hour from his MP3 player. The counts are
Alla [95]

sample 1=1 rock=1,200songs

5 0
3 years ago
A random sample of 12 recent college graduates reported an average starting salary of $54,000 with a standard deviation of $6,00
Marianna [84]

Answer: a.) $50188 to $57812

Step-by-step explanation: <u>Confidence</u> <u>Interval</u> (CI) is an interval of values in which we are confident the true mean is in.

The interval is calculated as

x ± z\frac{s}{\sqrt{n} }

a. For a 95% CI, z-value is 1.96.

Solving:

54,000 ± 1.96.\frac{6000}{\sqrt{12} }

54,000 ± 1.96\frac{6000}{3.464}

54,000 ± 1.96*1732.102

54,000 ± 3395

This means the interval is

50605 < μ < 57395

<u>With a 95% confidence interval, the mean starting salary of college graduates is between 50605 and 57395 or </u><u>from 50188 to 57812$.</u>

<u />

b. The mean starting salary for college students in 2017 is $50,516, which is in the confidence interval. Therefore, since we 95% sure the real mean is between 50188 and 57812, there was no significant change since 2017.

4 0
3 years ago
Can someone help me with this?
Mandarinka [93]

Answer:

Step-by-step explanation:

Area of rectangle = length * width

                             = (x + 4) (5x)

                             = x *5x + 4 *5x

                            = 5x² + 20x

Perimeter of rectangle = 2*(length + width)

                                     = 2*(x + 4 + 5x)

                                     = 2*(6x + 4)

                                   = 2*6x + 2 *4

                                     = 12x + 8

4 0
3 years ago
Evaluate the expression, xz- y, if x=3,y=6, and z =7
avanturin [10]
3*7-6
21-6=15
15 is the answer
4 0
3 years ago
A box of 10 bars of soap costs $10.88, while the same brand with 4 more bars costs $17.62. Which is the better buy? Round your a
horsena [70]

The box of 10 is a better buy because each bar of soap is worth $1.08 instead of $1.26 that you would pay for the box of 14.

7 0
3 years ago
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