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3 years ago

Wesley wrote a number between 21,389.72 and 21,390.2 Which of the following numbers could he have written?

Mathematics

2 answers:

cupoosta [38]3 years ago

7 0

Answer:

C) 21,389.8

Step-by-step explanation:

It's the only number between 21,389.72 and 21,390.2

Zarrin [17]3 years ago

7 0

The Answer: C. 21,389.8

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Mario is walking away from a motion detector at a rate of 1.5 feet per second. He started recording his distance from the motion

kipiarov [429]

Answer:

6 seconds

Step-by-step explanation:

Initial distance of Mario from motion detector = 2 ft

Speed of Mario = 1.5 ft/sec

Total distance of Mario from motion detector = 11 ft

Total distance moved by Mario while walking at the rate of 1.5 ft/sec = 11 - 2 = 9 ft

Given that:

Distance = 9 ft

Speed = 1.5 ft/sec

Formula:

$Distance = Speed \times Time$

$\Rightarrow 9 =1.5 \times Time\\\Rightarrow Time = \dfrac{9}{1.5}\\\Rightarrow Time = \bold{6\ sec}$

So, at 6 seconds, Mario will be 11 ft from the motion detector.

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3 years ago

A plane travels 3,625.26 miles in 6.9 hours. What is the plane’s unit rate?

Lunna [17]

Answer:

The correct answers are:

a) $\frac{3625.26 miles}{6.9hours}$

b)36252.6 tenths miles÷ 69 tenths hours

c) $\frac{3500miles}{7hours}= 500\frac{miles}{hour}$

d) $\frac{3625.26miles}{6.9hours} \frac{10}{10} =\frac{36252.6miles}{69hours}$

e) 525.4 miles/h

Step-by-step explanation:

The division is solved by using the division algorithm in the attached picture.

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3 years ago

For a daily airline flight between two cities, the number of pieces of checked luggage has a mean of 380 and a standard deviatio

Olegator [25]

Since one standard deviation is 20 luggages, 3 standard deviations above the mean is 3*20=60 luggages above the mean of 380 luggages, so 60+380 gives the answer C, 440.

3 0

3 years ago

Read 2 more answers

A text message plan costs $4 per month plus $0.32 per text. Find the monthly cost for x text messages.

krok68 [10]

Answer:

4 + 0.32x

Step-by-step explanation:

0.32 = cost of one text message

0.32x = cost of x text messages

4 + 0.32x = monthly cost of x text messages

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3 years ago

Read 2 more answers

The exponential function y= a(b)^x passes through the points (3,25) and (8,10). Which of the following is closest to the value o

Yuki888 [10]

If the exponential function $y=ab^x$ passes through the points (3,25) and (8,10), the value of b is 0.833

The given exponential equation is:

$y=ab^x$

The function passes through the points (3, 25) and (8, 10)

Substitute x = 3 and y = 25 into the function $y=ab^x$

$25=ab^3$ ............................(1)

Substitute x = 8 and y = 10 into the function $y=ab^x$

$10=ab^8$ .............................(2)

Divide equation (2) by equation (1)

$\frac{10}{25}=\frac{ab^8}{ab^3} \\\\0.4=b^5\\\\b=0.4^\frac{1}{5} \\\\b=0.4^{0.2}\\\\b=0.833$

Therefore, if the exponential function $y=ab^x$ passes through the points (3,25) and (8,10), the value of b is 0.833

Learn more on exponential functions here: brainly.com/question/12940982

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2 years ago