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notsponge [240]
3 years ago
10

a boat travels 45 miles upstream (against the current) in 5 hours. the boat travels the same distance downstream in 3 hours. wha

t is the rate of the current?
Mathematics
1 answer:
ser-zykov [4K]3 years ago
6 0
Im not sure, thats a good question?
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Let f(x)=x^2+2x+3 . What is the average rate of change for the quadratic function from x=−2 to x = 5?
miskamm [114]
To find the average rate of change of  given function f(x) on a given interval (a,b):

Find f(b)-f(a), b-a, and then divide your result for f(b)-f(a) by your result for b-a:


f(b) - f(a)
------------
    b-a

Here your function is f(x) = x^2 - 2x + 3.  Substituting b=5 and a=-2,
f(5) = 5^2 -2(5)+3 =?                          and f(-2) = (-2)^2 - 2(-2) + 3 = ?


Calculate           f(5) - [ f(-2) ]
                         ------------------ using your results, above.
                              5 - [-2]

Your answer to this, if done correctly, is the "average rate of change of the function f(x) = x^2+2x+3 on the interval [-2,5]."
5 0
3 years ago
A scuba diver dove 18 ft below the
Vlada [557]

Answer:

42 ft

Step-by-step explanation:

18 plus 24 equals 42 feet

6 0
3 years ago
Read 2 more answers
Conan O'Brien hosts the Conan show and Andy Richter, his sidekick, writes for it. Conan needs 4 hours to rehearse and host a goo
andrew-mc [135]

Answer:

C

Step-by-step explanation:

1. Conan needs 4 hours to rehearse and host a good show.  Andy needs 10 hours to do the same. So, Cohan needs 6 hours less than Andy to  rehearse and host a good show. This means Cohan has an absolute advantage in the production of show hosting.

2. Conan writes one usable joke in an hour,  Andy needs 2 hours to do the same. So, Cohan has an absolute advantage in the production of joke writing.

Thus, Cohan has an absolute advantage in the production of both show hosting and joke writing.

Correct option is option C.

4 0
3 years ago
Step 2: Calculate the measures of SPREAD for rs. Hampton's data in the dot plot. Show your work
GrogVix [38]

Answer:

-12

Step-by-step explanation:

don't rlly have an explanation

8 0
3 years ago
What is the area of the rectangle<br> below?
DiKsa [7]

Answer:

Area of rectangle = l×b= 3 1/4 × 1 1/2

= 31/8 = 4 7/8

4 0
1 year ago
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