All categories

3 years ago

During a scuba dive, Lainey descended to a point 23 feet below the ocean surface. She continued her

Mathematics

1 answer:

abruzzese [7]3 years ago

8 0

t (23) ≤ 97 - 23

The minus 23 at the back represents the feet she already descended before what the question wants us to calculate

≤ is used instead of < because it states more than, not "equal or more than" (meaning 97 sharp is fine)

You might be interested in

Solve the initial value problem: y'(x)=(4y(x)+25)^(1/2) ,y(1)=6. you can't really tell, but the '1/2' is the exponent

goblinko [34]

Answer:

$y(x)=x^2+5x$

Step-by-step explanation:

Given: $y'=\sqrt{4y+25}$

Initial value: y(1)=6

Let $y'=\dfrac{dy}{dx}$

$\dfrac{dy}{dx}=\sqrt{4y+25}$

Variable separable

$\dfrac{dy}{\sqrt{4y+25}}=dx$

Integrate both sides

$\int \dfrac{dy}{\sqrt{4y+25}}=\int dx$

$\sqrt{4y+25}=2x+C$

Initial condition, y(1)=6

$\sqrt{4\cdot 6+25}=2\cdot 1+C$

$C=5$

Put C into equation

Solution:

$\sqrt{4y+25}=2x+5$

$4y+25=(2x+5)^2$

$y(x)=\dfrac{1}{4}(2x+5)^2-\dfrac{25}{4}$

$y(x)=x^2+5x$

Hence, The solution is $y(x)=\dfrac{1}{4}(2x+5)^2-\dfrac{25}{4}$ or $y(x)=x^2+5x$

4 0

2 years ago

31*r+1.1*(35−31)*r = 410.64.

Rasek [7]

Answer:

11.6

Step-by-step explanation:

<u>Solving with steps as below:</u>

31*r+1.1*(35−31)*r = 410.64
31r + 1.1*4r = 410.64
31r + 4.4r = 410.64
35.4r = 410.64
r = 410.64/35.4
r = 11.6

<u>Answer is:</u> r =11.6

5 0

3 years ago

Please help! I will give brainliest! :)

Neporo4naja [7]

Answer:

25,821

Step-by-step explanation:

To find the town's population in 19 years you just have to do 17,724* $1.02^{19}$ because each year the population will be 1.02 times the year before. That would be 25,820.5212 which is 25,281 rounded to the nearest whole number.

Hope this helps :)

6 0

2 years ago

SOMEONE HELP PRETTY PLEASE!?!? If you are studying the effects of UV rays on eyesight and you group 10 people together and make

Anna [14]

Answer: D. Effects of UV rays on eyesight

Step-by-step explanation:

The whole point of this study is to find the effects of people either with wearing or not wearing sunglasses for 10 weeks and being exposed to UV rays.

8 0

2 years ago

Express the ratio in the simplest form. 5.6 m to 28 cm

Aleks [24]

<h3>your answer is 20: 1 2 </h3>

<h2>hope it's helpful for you ✌️❤️ ✌️✌️✌️✌️</h2>

7 0

3 years ago

Read 2 more answers