Answer:
Speed of boat in still water = 15 km/hr
Step-by-step explanation:
Let the speed of the boat in still water = x km/hr
Speed of the stream = 3km/hr
Then effective speed of the boat when travelling upstream = x-3 km/hr
Effective speed of the boat when travelling downstream = x+3 km/hr
Time taken for traveling 36 km downstream = Time taken for traveling 24 km upstream
=>
=>
=>
=>
=>
=> x=15
It's useful so when you go to the grocery store you know how much of whatever you need and you can multiply, divide, and subtract if needed. Without mathematics we wouldn't be able to calculate things. If you're a cashier for example, you need to know how to count change and count the money the person gives you. If you're a customer, you need to know how much to give the cashier and that involves mathematics. I hope this helped!!!
Answer:
2.25 F
Step-by-step explanation:
I subtracted 3/4 from 3.
Hope this helped.
-Pepsi
From a point A draw a line 19° to the horizontal representing the hill. On the hill, 230 ft from the point A, draw a vertical line.h, representing the height of the tree. From the point A, draw another line 49° to the horizontal to the top of the tree. Lastly, from the bottom of the tree, extend a vertical line (y) down to a point on the horizontal.
let x be the distance from point A to when y intersects the horizonal.
x/230=cos 19
x=230 cos 19=217.5
y/x=tan 19
y=xtan19
y=217.5 tan 19=74.88
(h+y)/x=tan 49
h+y=xtan 49=217.5tan49=250.205
hence
h=250.205-74.88=175.325 ft
the answer is:
height of the tree ~ 175 ft
Answer:
An Arc is a part of a circle that represents an angle.