To find how many they baked together you need to add both of their cookes together being 58 + 117 = 175 meaning together they baked 175 cookies
if the diameter of a circle is 15, its radius is half that or 7.5.
A pair of lowercase letters represents a recessive gene.
For further clarification, if needed... If the punnett square was for dark hair being dominant over blonde hair, the offspring that was represented by two lowercase letters in a punnett square would have a phenotype of blonde hair.