Answer:
Use 
3. 13.9 km
4. 40 in
Step-by-step explanation:
Use Pythagorean theorem to solve side lengths!
3. 

4. 

Hope this helps! :0)
Easy, since you have the diameter, which is very needed in order to find the circumference, you can use the equation d x 3.14 = c. d is the diameter and c is the circumference to 300 x 3.14 = 942 ft
Answer:
3/2
Step-by-step explanation:
Because the problem tells you that the two triangles are similar, the value of a/b would be equivalent for both triangles. The fact that they are right triangles also indicates which sides are which in case the image was not drawn to scale. A is proportional to 2.1 and b is proportional to 1.4. So a/b= 2.1/1.4. This can reduce itself to 3/2 because both are divisible by .7
Answer:
7 - 2i
Step-by-step explanation:
Here we have two complex numbers and wish to combine them. Complex numbers have real and imaginary parts. We sum up the real parts and the imaginary parts separately:
-9 - 7i
+16 + 5i
------------
7 - 2i This is the sum of -9 -7i and 16 + 5i.