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2 years ago

In right triangle ABC, altitude CD is drawn to its hypotenuse. Select all triangles which must be similar to triangle ABC.

Mathematics

2 answers:

ololo11 [35]2 years ago

5 0

Answer:

ABC,ACD,CBD

Step-by-step explanation:

I copied this answer for brainly points lol it is correct I used the same answer :)

Fynjy0 [20]2 years ago

4 0

Answer: ABC, ACD, CBD

Step-by-step explanation: I just did this problem and got it wrong. It then gave me the correct answer which is ABC, ACD, CBD.

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A competitive knitter is knitting a circular place mat. The radius of the mat is given by the formula

Ilia_Sergeevich [38]

Answer: A. $A'(t)=\frac{4356\pi}{(t+11)^{3}}-\frac{527076\pi}{(t+11)^{5}}$

B. A'(5) = 1.76 cm/s

Step-by-step explanation: <u>Rate</u> <u>of</u> <u>change</u> measures the slope of a curve at a certain instant, therefore, rate is the derivative.

A. Area of a circle is given by

$A=\pi.r^{2}$

So to find the rate of the area:

$\frac{dA}{dt}=\frac{dA}{dr}.\frac{dr}{dt}$

$\frac{dA}{dr} =2.\pi.r$

Using $r(t)=3-\frac{363}{(t+11)^{2}}$

$\frac{dr}{dt}=\frac{726}{(t+11)^{3}}$

Then

$\frac{dA}{dt}=2.\pi.r.[\frac{726}{(t+11)^{3}}]$

$\frac{dA}{dt}=2.\pi.[3-\frac{363}{(t+11)^{2}}].\frac{726}{(t+11)^{3}}$

Multipying and simplifying:

$\frac{dA}{dt}=\frac{4356\pi}{(t+11)^{3}} -\frac{527076\pi}{(t+11)^{5}}$

The rate at which the area is increasing is given by expression $A'(t)=\frac{4356\pi}{(t+11)^{3}} -\frac{527076\pi}{(t+11)^{5}}$ .

B. At t = 5, rate is:

$A'(5)=\frac{4356\pi}{(5+11)^{3}} -\frac{527076\pi}{(5+11)^{5}}$

$A'(5)=\frac{4356\pi}{4096} -\frac{527076\pi}{1048576}$

$A'(5)=\frac{2408693760\pi}{4294967296}$

$A'(5)=1.76268$

At 5 seconds, the area is expanded at a rate of 1.76 cm/s.

5 0

3 years ago

Scores for a standardized test are normally distributed with a mean of 350 and a standard deviation of 25. If 1793 students scor

Sergeu [11.5K]

Answer:

I think this is right 50 but I don't know I am 3rd grade

Step-by-step explanation:

<h2>so tha $so look 350 so minus that is 50$ s my answer</h2>

6 0

2 years ago

the cost C (in dollars) of making n watches is represented by C = 15n + 85. How many watches are made when the cost is $385?

liberstina [14]

20 watches are made since 385 = 15n + 85. 385 - 85 is 300 and 300 divides by 15 is 20.

4 0

3 years ago

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a scuba diver dives down 70 feet down into the ocean. he then swims another 40 feet down what is the new elevation of the scuba

hoa [83]

Answer:

-110

Step-by-step explanation:

-70 + -40 = -110

7 0

3 years ago

If f(x) = x + 8 and g(x) = –4x – 3, find (f + g)(x).

Alecsey [184]

Answer:

Step-by-step explanation:

(f + g)(x)

= f(x) + g(x)

= x + 8 - 4x - 3 ← collect like terms

= - 3x + 5

5 0

2 years ago

Read 2 more answers