Ask question

Ask question

All categories

3 years ago

11

a clock tower is 26 feet tall and a shadow 24 feet long while a large truck next to the tower cast a shadow 12 feet long how tal

l is the truck

1 answer:

mixas84 [53]3 years ago

5 0

The truck in this example is 14 feet tall if it's shadow is 12 feet long.

You might be interested in

Giving brainliest!!!!!!!!!!

son4ous [18]

It’s A i did the test myself..

5 0

3 years ago

Is 28 a solution to the inequality you wrote in Exercise 3? How do you know?

Evgen [1.6K]

Answer:

Yes

Step-by-step explanation:

s<30

Put in 28 for s

28<30

Twenty eight is less than 30 so it is a solution

6 0

3 years ago

Let f(x)=g(x)h(x), g(10)=-4, h(10)=560, g'(10)=0, and h'(10)=35. find f'(10)

Ulleksa [173]

This question has extraneous info to trick you.
f(x) = g(x)h(x) ⇒ f'(x) = g'(x)h'(x) . Letting x = 10, we get f'(10) = g'(10)h'(10). then just plug in the values provided. g(10) and h(10) are there to throw you off, just use g'(10) and h'(10).
So f'(10), pronounced "eff prime of ten", = 0 * 35 = 0.

If the question were asking for f(10) instead of f'(10) then you would use g(10) and h(10), ⇒-4*560=90.

7 0

3 years ago

Suppose that a large mixing tank initially holds 400 gallons of water in which 70 pounds of salt have been dissolved. Pure water

Setler79 [48]

Answer:

Step-by-step explanation:

Given that a large mixing tank initially holds 400 gallons of water in which 70 pounds of salt have been dissolved. Pure water is pumped into the tank at a rate of 4 gal/min, and when the solution is well stirred, it is then pumped out at the same rate.

Let Q(t) be the quantity of salt at time t.

Q(0) = 70 pounds

Inflow of water = outflow = 4 gal/min

So resulting volume of tank at time t = 400 gallons

Rate of change of salt = inflow - outflow

= 0 - $\frac{Q(t)}{400}$

i.e. $\frac{dQ}{dt} =\frac{-Q(t)}{400}$

This is a variable separable equation

$\frac{dQ}{Q}=-\frac{dt}{400} \\ln Q = {-\frac{t}{400}} +C\\Q = A e^{-\frac{t}{400}}$

Use when t =0 Q = 70

A =70

So A(t) = Q(t) = $70 e^{-\frac{t}{400}}$ and

A(0) = Q(0) = 70 lbs.

7 0

3 years ago

Mary moves 3 steps backward as she dances

IgorLugansk [536]

Where’s the question????

3 0

3 years ago