Answer:
13.44
Step-by-step explanation:
she is right...........
S+9
More than suggests addition.
When you divide exponents, you have to subtract them. So -4-3= -7 as the exponent
When you have a negative exponent, then you have to flip the fraction (all whole numbers are over 1 so flip the 1 to the top and the 5^7 on the bottom)
5p+10p+(10p-16)
5p times two is 10p and since Ching baked 16 fewer it is 10p-16