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masya89 [10]
3 years ago
15

A motorboat can go 16 miles downstream on a river in 20 minutes. It takes 30 minutes for this boat to go back upstream the same

16 miles. Let x = the speed of the boat. Let y = the speed of the current. a. Write an equation for the motion of the motorboat downstream. b. Write an equation for the motion of the motorboat upstream. c. Find the speed of the current.
Mathematics
1 answer:
Katyanochek1 [597]3 years ago
7 0

Answer:

A) d = 48t, d in miles, t in hours

B)d = 32t, d in miles, t in hours

C)y = 8 mph

Step-by-step explanation:

16 miles in 20 mins = 48 mph

16 miles in 30 mins = 32 mph

The boat speed is the average = (48 + 32)/2 = 40 mph

The current is the difference = 8 mph

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Galactic Rotation Speed. We are located about 27,000 light-years from the galactic center and we orbit the center about once eve
Alexxandr [17]

Answer:

speed = 796142.197 km/hr

Step-by-step explanation:

solution

we consider here orbit around galactic center is circular so

circumference formula will be here

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here we know r = 27000

so

circumference C = 2 π × 27000

C = 169560 light year

so

we travel 169560 light year in 230000000 years

so distance will be

distance = \frac{169560}{230000000}

distance = 0.00073721 light year/year

and we know 1 year = 8760 hours

so 1 light year = 9.46027 ×10^{12} km

so

sped of moving is

speed = 0.00073721 × 9.46027 × \frac{10^{12}}{8760}  km/hr

speed = 796142.197 km/hr

5 0
4 years ago
A square coaster has a side length of 512 feet on each side.
OLga [1]
262,144 feet squared

This seems like a big number but area length times width. If the coaster is square then all sides are the same so the length and width are both 512 feet. This means you multiply 512 and 512. With that you get 262,144 feet squared.
8 0
4 years ago
Read 2 more answers
How many triangles can be made with the measurements of 65 60 60
Jobisdone [24]

Answer:

1

Step-by-step explanation:

one because when measurements like that it can make only make one you can't change the size and can't change the angles because if you change the angles then it changes the measurements. now if it was angles then you can make it bigger and it can still have the same angles. so that would make more   than 1 triangles

4 0
3 years ago
How would you put this in a graph
Lerok [7]

Answer:

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ALGEBRA PROBLEM PLEASE HELP
Lera25 [3.4K]

Answer:

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