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3 years ago

Pls help it's confusing

Mathematics

2 answers:

cricket20 [7]3 years ago

5 0

73-14=59
The fish is now 59 feet below sea level.

kodGreya [7K]3 years ago

3 0

Answer:

59 feet below sea level

Step-by-step explanation:

(It might be a little confusing because the question says "swim up" which might think you need to add when you actually need to subtract).

Keep in mind that sea level is exactly 0 feet.

73-14 = 59

The fish starts off at 73 feet below sea level.

It swims up 14 ft.

I took 73 and subtracted 14 from it and got 59.

Does this make sense? I'm here if you need help clarifying!

Hope this helps!

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Evaluate the expression a3 -b/c for a = 3, b = 2 and c = 4. write in simplest form

Scilla [17]

Hello There!

Write out your equation:
$(a^3 - b)/c$
Substitute the values in:
$(3^3 - 2)/4$
Simplify:
$(27 - 2)/4$
$25/4$
Solve:
It is 6.25.

Therefore, your answer is 6 1/4.

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- Hannah ❤

6 0

3 years ago

A ladder 16 feet long is leaning against the wall of a tall building. The base of the ladder is moving away from the wall at a r

svet-max [94.6K]

Answer:

a. 0.588

b. 0.0722

c. 4.576 sqft/sec

Step-by-step explanation:

Let b and h denote the base and height as indicated in the diagram. By pythagoras theorem, $h^2 + b^2 = 16^2 = 256 \dotsc\;(1)$ because it is a right angle triangle.

It is given that $\frac{db}{dt} = 1$

Now differentiate (1) with respect to t (time) :

$\displaystyle{2h\frac{dh}{dt} + 2b\frac{db}{dt} = 0 \implies \frac{dh}{dt} = -\frac{b}{h} \frac{db}{dt}}$

$\displaystyle{=-\frac{b}{\sqrt{256 - b^2}} \frac{db}{dt} = -\frac{8}{13.856} \times 1 = -0.588}$

The minus sign indicates that the value of h is actually decreasing. The required answer is 0.588.

b. From the diagram, infer that $16 \sin{\theta} = b$ . When b = 8, then $\theta = \arcsin{0.5} = \ang{30}$ .

Differentiate the above equation w.r.t t

$\displaystyle{16 \cos{\theta} \frac{d\theta}{dt} = \frac{db}{dt} \implies \frac{d\theta}{dt} = \frac{1}{16 \cos{\theta}} = \frac{1}{13.856} = \mathbf{0.0722}}$

c. The area of the triangle is given by $A = 0.5\times h \times b$ . Differentiating w.r.t t,

$\displatstyle{\frac{dA}{dt} = 0.5 b \frac{dh}{dt} + 0.5 h \frac{db}{dt}}$

Plugging in b = 8, h = 13.856, $\frac{dh}{dt} = -0.588$ ,

$\frac{dA}{dt} = -2.352 + 6.928 = \mathbf{4.576 ft^2/sec}$

8 0

3 years ago

For the function f(x)=(x+6)^3, rind f^-1(x)

qaws [65]

Answer:

$f^{-1}(x)=\sqrt[3]{x}-6$

Step-by-step explanation:

$f(x)=(x+6)^3$

$y=(x+6)^3$

$x=(y+6)^3$

$\sqrt[3]{x}=y+6$

$\sqrt[3]{x}-6=y$

5 0

2 years ago

Find the value of x.

UNO [17]

Answer:

x = 8

Step-by-step explanation:

Since you know that the line is 180 degrees in total, and there is a right angle, then you know . . .

180 = 90 + 40 + 6x + 2

Subtract 90 + 40 + 2 on both sides

48 = 6x

Divide by 6 on both sides.

x = 8

You have your answer.

Please mark for brainliest!! :D Thanks!

For more questions or information, comment below.

5 0

3 years ago

Why is (5+2) to the second power is not equal to 5 to the second power plus 2 to the second power is not equal

Olin [163]

Because 5 +2 is 7 and seven to the second power is 49. On the other hand 5 squared is 25 and 2 to the second power is 4 when you ad them together you get 29 you are taking to completely different numbers to the power of two and that’s why they aren’t equal

3 0

3 years ago

Read 2 more answers

Pls help it's confusing​

Pls help it's confusing