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Rainbow [258]
4 years ago
9

Select the correct choices to complete the sentence. Three drivers competed in the same fifteen drag races. The mean and standar

d deviation for the race times of each of the drivers are given. Driver A had a mean race time of 4.01 seconds and a standard deviation of 0.05 seconds. Driver B had a mean race time of 3.96 seconds and a standard deviation of 0.12 seconds. Driver C had a mean race time of 3.99 seconds and a standard deviation of 0.19 seconds. a. Which driver had the fastest typical race time?
Mathematics
1 answer:
sweet [91]4 years ago
4 0

Answer:

<h2> Driver B has the fastest race time</h2>

Step-by-step explanation:

From the options presented, driver B has the fastest typical race time because he recorded the smallest time taken to complete an individual race.

Also from the standard deviation given (3.96) for driver B, it shows that the individual time spread from the standard deviation is minimal and that the driver maintained a fairly consistent time of race throughout the racing period.

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5x-19≤1 OR -4x+3 -9/4 <br> D) No solution <br> E) All values of x are solutions
sukhopar [10]

Answer:

i'm not sure let me write down the equation one more time

Step-by-step explanation:

6 0
4 years ago
Two numbers have the ratio of 4:7 if their sum is 143 what are the numbers?
garri49 [273]

Answer:

52:91

Step-by-step explanation:

To find a ratio value you need to think of it more as two numerators that together equal one whole. 4+7 is 11 so that would be the denominator. If the sum is 143, then we divide by 11 since one number is 4/11s of 143, and the other is 7/11s of 143. 143/11=13

now we multiply both:

4(13)=52

7(13)=91

Check:

91+52=143

52/91 simplifies to 4/7 or 4:7

i hope this helps!

3 0
3 years ago
Complete the conjecture.
alexandr402 [8]

Answer:

6

Step-by-step explanation:

7 0
3 years ago
a motorboat travels 371 kilometers in 7 hours going upstream. it travels 525 kilometers going downstream in the same amount of t
e-lub [12.9K]

Answer:

Speed of boat in still water = 64 km/hr

Speed of the current = 11 km/hr

Step-by-step explanation:

Let the speed of motorboat in still water = x km/hr

Let the speed of current = y km/hr

Motorboat travels 371 km in 7 hours going upstream.

Speed of motorboat while going upstream = speed of motorboat in still water - speed of current = (x-y)

=> \[x-y = \frac{371}{7}\]

=> \[x-y = 53\] ------------------------------(1)

Motorboat travels 525 km in 7 hours going downstream.

Speed of motorboat while going downstream = speed of motorboat in still water + speed of current = (x+y)

=> \[x+y = \frac{525}{7}\]

=> \[x+y = 75\] -----------------------------(2)

Solving for x and y from (1) and (2):

Adding (1) and (2):

2x = 128

=> x = 64

Substituting the value of x in (1), y = 11

6 0
3 years ago
A $250 suede jacket is on sale for 20%off how much should you pay for the jacket
yarga [219]
250 * 0.20 = $50 sale
250 - 50 = $200
You will pay $200 after sale
4 0
3 years ago
Read 2 more answers
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