Answer:
Alyssa work at job A 
Step-by-step explanation:
Let
x------> the number of hours at work A
y------> the number of hours at work B
we know that
-----> equation A
-----> equation B
substitute equation A in equation B






It depends in the type on interest
Simple Interest
PxRxT
£3000 x 0.05 x 3 = £450
£3000 + £450 = £3450
Compound Interest
Px(1+R)^T
£3000 x (1 + 0.05)³ = £3472.875 = £3472.88
Given expression- 
Here, V(r) is the function dependent on the variable r whch is the radius of any sphere.
By plugging different values of r in the formula. one can find the volume associated with it.
Here, V(r) represents the volume of the sphere when the radius is equal to r.