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3 years ago

Can someone help me with letter b along with an explanation.

Mathematics

2 answers:

lana66690 [7]3 years ago

7 0

Step-by-step explanation:

Forced vital capacity: the maximum amount of air you can forcibly exhale from your lungs after fully inhaling. It is about 80 percent of total capacity, or 4.8 liters, because some air remains in your lungs after you exhale

sveta [45]3 years ago

7 0

9514 1404 393

Answer:

a) 1.70 L

b) 16 breaths per minute

Step-by-step explanation:

a) The maximum value of v(t) occurs when the sine function is at its maximum value of 1. In that case, the volume is ...

1.27 +0.43×1 = 1.70 . . . liters

b) One full breath cycle takes a period of time that makes the argument of the sine function be 2π. The that time period is ...

1.71t = 2π

t = 2π/1.71 ≈ 3.6744 . . . seconds

Then the number of breaths per minute is ...

(60 seconds/minute)/(3.6744 seconds/breath) ≈ 16.33 breaths/minute

The person takes about 16 breaths per minute while sleeping.

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Pam has 228 ounces of lemonade. She pours the lemonade into

Virty [35]

Answer:

4 ounces

Step-by-step explanation:

If you divide 228 by 8, you will get 28.5. The 0.5 into a fraction would be 1/2. Half of 8 would be 4. In the end, there should be 28 full 8-ounce cups and one cup with 4 ounces.

5 0

3 years ago

Rob saves £500 in his bank account.

dmitriy555 [2]

Answer:

step 1: =4% of £500

=20

=20 × 5 years

= 100

= £500 + £100

=£600 ....therefore Rob will have £600 in his bank account after years.

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3 years ago

You toss a rock of mass m vertically upward. Air resistance can be neglected. The rock reaches a maximum height h above your han

laiz [17]

Answer:

$v=\sqrt{\frac{3gh}{2}}$

Step-by-step explanation:

If air resistance is neglected, the energy is constant. That means that in every point in the trajectory the energy is the same.

At the point of height h, all the energy is potential and velocity is zero (no kinetic energy)

$E=mgh$

At point of height h/4, some of the potential energy has transformed in kinetic energy and the velocity is no longer zero. But we know the total amount of energy is the same as the maximum height point.

With that information, we can calculate the velocity v:

$E=mg(\frac{h}{4})+m\frac{v^2}{2}=mgh\\\\m\frac{v^2}{2}=mg(h-\frac{h}{4})\\\\\frac{v^2}{2}=\frac{3gh}{4}\\\\v^2=\frac{3gh}{2}\\\\v=\sqrt{\frac{3gh}{2}}$

7 0

3 years ago

Read 2 more answers

What is the answer to 4(x + 3) < 7x - 3x - 11

diamong [38]

Answer:

THE ANS IS 0<-23

Step-by-step explanation:

4(X+3)< 7x-3x-11

4x+12< 4x-11

4x will be cancelled,

So we get,

4x-4x< -11-12

0 < -23

Thank YOU AND PLZ MARK AS BRAINLY AND GIVE RATING ALSO

4 0

3 years ago

John called a plumber to fix a leak in his bathroom. The

Dimas [21]

Answer:

3 hours

Step-by-step explanation:

$105 - $30 = $75

$75 ÷ $25 = 3 hours

7 0

3 years ago