1/3 divided by 2 is 1/6. Just half 1/3.
Answer:
2650
Step-by-step explanation:
Given: 2648
Two significant figures means we need to round off to the nearest tens place.
In 2648, the tens place is 4
To round off the tens place, we need to look for the next digit that is right to tens place, which is 8
8 is greater than 5, so we need to add 1 with tens place (4 +1 = 5)
Therefore, it is 2650
Hope this will helpful.
Thank you.
Answer:
Step-by-step explanation:
The sides of the larger rectangle are 10 cm and 6 cm.
The sides of the part cut out are 3 cm and 2 cm.
The part cut out is attached to one of the sides of the rectangle.
Perimeter of the new shape will be
Perimeter of old shape
Change in the perimeter is 
The perimeter of changed by .
Okay, you will need to use the law of cosines for this problem.
The Law of Cosines states (in this case): a^2 = b^2 + c^2 - 2 * b * c * cos A, where "a" is the side opposite angle A (7 inches), and b and c are the other two sides.
Plug the numbers in and you get: 7^2 = 5^2 + 9^2 - 2 * 5 * 9 * cos A, or:
49 = 25 + 81 - 90 * cos A.
Subtract (25 + 81) from both sides to get:
-57 = -90 * cos A.
Divide by -90 on both sides:
cos A = 19/30
To find A, you do the inverse trigonometric function to get:
cos^-1 of (19/30) = A.
I don't have a calculator that can do this right now, but if you plug the left side of the above equation into it (make sure it is in degrees, not radians), you should get A.
