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3 years ago

Geometry need to find the lengths of DE , EF AND DF , respectively? ASAP

Mathematics

1 answer:

fredd [130]3 years ago

7 0

Answer:

option D

because every length is one fifth of the corresponding length of the bigger triangle

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g A 5 foot tall man walks at 10 ft/s toward a street light that is 20 ft above the ground. What is the rate of change of the len

vredina [299]

Answer:

$-\frac{10}{3}ft/s$

Step-by-step explanation:

We are given that

Height of man=5 foot

$\frac{dy}{dt}=-10ft/s$

Height of street light=20ft

We have to find the rate of change of the length of his shadow when he is 25 ft form the street light.

ABE and CDE are similar triangle because all right triangles are similar.

$\frac{20}{5}=\frac{x+y}{x}$

$4=\frac{x+y}{x}$

$4x=x+y$

$4x-x=y$

$3x=y$

$3\frac{dx}{dt}=\frac{dy}{dt}$

$\frac{dx}{dt}=\frac{1}{3}(-10)=-\frac{10}{3}ft/s=-\frac{10}{3}ft/s$

Hence, the rate of change of the length of his shadow when he is 25 ft from the street light= $-\frac{10}{3}ft/s$

7 0

3 years ago

9/34 × 17/6 =<br><br> PLEASE HELP

Deffense [45]

It would equal 0.75 and as a fraction it is 3/4

4 0

3 years ago

Read 2 more answers

I need help with this question please

Marina86 [1]

Answer:

Step-by-step explanation:

√14 cannot be rewritten as the ratio of two integers and thus is irrational.

Similarly, √99 is irrational; √99 = √9√11 is irrational even though √9 is not.

3 0

3 years ago

35 of 39

natali 33 [55]

Step-by-step explanation:

5x 3 1/2 = 3 x 5 1/2 is false

3 0

3 years ago

Find the prime factorization for the number 48 expressed in exponential notation.<br>Thank you.

STatiana [176]

48
12 * 4
6 * 2 * 2 * 2
3 * 2 * 2 * 2 * 2
it should be 3 * 2^4...but that is not an answer choice

3 * 2^2 * 4 is ur answer....apparently they didn't factor the 4

6 0

3 years ago