R is the rate (10%)
C=20, begiing rate
T=time=8
so
h=20(1+0.10)^8
h=20(1.1)^8
h=42.8718
ronnd
$42.87
D is answer
Word form-five hundred six thousand,seven hundred nine
Expanded form-500,000+6,000+700+9
You have to find the cos of angle A, so use the Pythagorean equation and trig laws to find the other side of the triangle created by angle A. 3^2 + x^2 = 5^2. x=4. This means cos(A) = 4/5). Make both cos (A) and cos (B) have equal denominators, and add. 148/185 + 60/185 = 208/185. This answer is correct, though it doesn’t appear to be any of the answers you wrote, so either those answers are wrong or you wrote something incorrectly in the problem.
20% = 0.20
800 * 1.20 = 960
total cost = £960
The angles in the new triangle is the same as the original triangle.
The angles are the same, they are not multiplied by the factor of 1.5
