1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Georgia [21]
3 years ago
14

An excellent swimmer is confident he can judge his speed in the water exactly. He bets he can swim two lengths of a 50-meter Oly

mpic size pool at an average speed of precisely 2 meters per second. On his first lane he is a little bit slow and ends up going at 1.5 meters per second. Which average speed does he have to reach on his second lane to win the bet?
Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
6 0
The time needed at 2 meters per second for both rounds would be 100/2 s or 50 seconds. For the first lane he already used 50/1.5 -> 33.33 seconds, so he would need to cover the other 50 meters in exactly 16.67. 50m divided by the 16.67 seconds he has left means he has to swim at a speed of 3 meters per second.
You might be interested in
The gas mileage for a certain model of car is known to have a standard deviation of 6 mi/gallon. A simple random sample of 49 ca
lord [1]

Answer:

The answer is "(27.030,29.770)"

Step-by-step explanation:

(\bar{x}) = 28.4

(n)= 49

(\sigma) = 6

(CI) = \bar{x}\pm z^*_{\frac{\alpha}{2}} \frac{\sigma}{\sqrt{n}}

z^*_{\frac{\alpha}{2}}\ for \ 89\%\ confidence = 1.598 \\\\\text{Using z table }\\\\ NORM.S.INV(1-\frac{(1-0.89)}{2})

CI = 28.4 \pm 1.598 \times  \frac{6}{\sqrt{49}}=(27.030,29.770)

8 0
2 years ago
Solve for x.
OLga [1]
305 11/45

Step by step explanation
3 0
2 years ago
Heart Fact #1: The average human heart beats 70 times per minute. At that rate, how many times will be in one hour one day one y
Aleks04 [339]
Multiply it by 60 to get 4200 per hr. multiply 4200 by 24 to get 100800. multiply that by 365 to get 36792000 then multiply that by 14 to get <span>515088000</span>
8 0
3 years ago
z scores are useful because they:a. allow us to convert raw scores to mean scores, compare scores from different samples, and tr
Alla [95]

Answer:

they give us a sense of where a score falls in relation to the mean of its population (in terms of standard deviation of its population), 2) they allow us to compare scores from different distributions, and 3) they can be transformed into percentiles.

Step-by-step explanation:

3 0
3 years ago
Pls help me ............
Alex73 [517]

Answer:

7

Step-by-step explanation:

2v ÷ e + 3

we want to find the value of the expression when v = 10 and e = 5

to do so we substitute the values into the expression

2v ÷ e + 3

==> substitute 10 for v and 5 for e

2(10) ÷ 5 + 3

We now evaluate using bpemdas

==> multiply 2 and 10

20 ÷ 5 + 3

==> divide 20 by 5

4 + 3

==> add 4 and 3

= 7

6 0
1 year ago
Other questions:
  • Help ASAP please!!!
    14·1 answer
  • jacob is going shopping he finds a great deal on a laptop foe 40% off the original price if the sale price is $525 what is the o
    8·2 answers
  • The rectangle shown has a perimeter of 78 cm and the given area. Its length is 3 more than five times its width. Write and solve
    11·1 answer
  • What is the answer ?
    5·2 answers
  • Y divided by 3 is equal to 15
    9·2 answers
  • WILL GIVE BRAINIEST PLEASE ANSWER AND GIVE EXPLANATION THANKS
    12·1 answer
  • What percent of 600 is 12
    8·1 answer
  • Chet stopped in the ski lodge and spent $4.95 on Tums and a cup of
    13·1 answer
  • Drag each sign or value to the correct location on the equation. Each sign or value can be used more than once, but not all sign
    6·1 answer
  • Kala received a $70 gift card for a coffee store. She used it in buying some coffee that cost $8.58 per pound. After buying the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!