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
Ipatiy [6.2K]
3 years ago
8

A fish was swimming 2 ½ feet below the water's surface at 1:00 pm. Three hours later, the fish was at a depth that is 3 ¼ feet b

elow where it was at 1:00 pm. What rational number represents the position of the fist with respect to the water's surface at 4:00 pm?
Mathematics
1 answer:
IgorC [24]3 years ago
6 0

Answer:

The fish will be at a distance of 5 3/4 ft from the water surface at 4:00 pm

Step-by-step explanation:

Here, we want to find a rational number that represents the position of the Fish at 4pm

Initially it was at a depth of 2 1/2 ft below the water surface

At 4pm, it went 3 1/4 ft further

Thus, its position with respect to the water surface at 4 pm will be;

2 1/2 + 3 1/4

= 5/2 + 13/4 = (10 + 13)/4 = 23/4 = 5 3/4 ft

You might be interested in
A survey of 100 similar-sized hospitals revealed a mean daily census in the pediatrics service of 27 with a standard deviation o
Vinil7 [7]

Answer:

We conclude that the mean is greater than 25.  

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 25

Sample mean, \bar{x} = 27

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 6.5

First, we design the null and the alternate hypothesis

H_{0}: \mu = 25\\H_A: \mu> 25

We use One-tailed(right) z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{27 - 25}{\frac{6.5}{\sqrt{100}} } = 3.07

Now, z_{critical} \text{ at 0.05 level of significance } = 1.645

Since,  

z_{stat} > z_{critical}

We reject the null hypothesis and accept the alternate hypothesis.

Thus,  the mean is greater than 25.

3 0
3 years ago
Find the number of real number solutions for the equation.
vampirchik [111]

Answer:

<u><em>x = ±1</em></u>

Step-by-step explanation:

x² + 0x -1 = 0

x²- 1 = 0

x² = 1

x = ±1

--------------

check

1² + 0x - 1 = 0

1 - 1 = 0

5 0
2 years ago
Compare: 7/20 O 35%<br><br> who answers first get brainlest
Ugo [173]

Step-by-step explanation:

7/20

=0.35

35%

=35/100

=0.35

Hence, 7/20=35%

7 0
3 years ago
Find the value.<br> 9x+6 when x=-2/3
OLEGan [10]

Answer:

<h2>0</h2>

Step-by-step explanation:

Given,

-  \frac{2}{3}

Now, let's find the value of 9x + 6

9x + 6

plug the value of X

= 9 \times  (-  \frac{2}{3} ) + 6

Multiplying a positive and negative equals a negative

( + ) \times ( - ) = ( - )

=  - 9 \times  \frac{2}{3}  + 6

Reduce the number with Greatest Common Factor 3

=  - 3 \times 2 + 6

Multiply the numbers

=  - 6 + 6

The sum of two opposites equals 0

= 0

Hope this helps..

best regards!!

7 0
3 years ago
What fraction of 3 is 2 2/5
Yuki888 [10]

Answer: 2 2/5 is 4/5 of 3

Step-by-step explanation:

We can view that as what do we multiply 3 by to get 2 2/5 and call that value x

3x = 2 2/5

x = (2 2/5)/3

Let's turn 2 2/5 into an improper fraction... 2 2/5 = 12/5

So we have

x = (12/5)/3 = (12/5)(1/3) = 4/5

Thus 2 2/5 is 4/5 of 3

Verify:  3(4/5) = 12/5 = 2 2/5

5 0
2 years ago
Other questions:
  • These ones always confuse me.
    11·1 answer
  • James went to the amusement park. He had $20. He spent $5.50 on a hamburger and
    8·2 answers
  • Solve for the inequality ᵏ⁄₄ ≥ 6
    8·2 answers
  • True or false question<br> please help
    10·2 answers
  • Plz plz answer this 11pts:)
    9·1 answer
  • Pls help geometry please and thank you
    10·2 answers
  • Ana ganha 1200,00 reais em seu trabalho, se ela gastar um quinto em comida e dois terços do que sobrar em aluguel, quanto sobra,
    13·1 answer
  • Solve the triangle AMDM
    11·2 answers
  • What îs judy’s motto about zootopia to Find out skip count by 5s then crack the code
    14·1 answer
  • 1.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!