Answer:
19
Step-by-step explanation:
Answer:

Step-by-step explanation:
We can use the double angle identity for sine.

The given expresion is

We apply the identity to get:

We simplify to obtain;

This simplifies to:
The correct answer is D
Answer: A=70 square units
Step-by-step explanation:
The area of a triangle can be found using the formula 
Let 5=h and 7=b
Plug in the values and solve


However, since four of these triangles make up this rhombus, we can multiply the area of one of these triangles by four to find the area of the whole rhombus.


Answer: circumference: 22π area: 121π
Step-by-step explanation:
area of a circle is 
circumference is 
It would be 4d because there is a one in from the d that is by itself but you cannot see it and therefore 5d-1d= 4d.
Hope this helps! :)