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A, the weight of the new bar of a soap is 123 grams.

Step-by-step explanation:

In this instance, the y-intercept is at y = 123, where x = 0. Since x = 0,  and 'x' represents the # of times the soap bar was used, this would mean that the bar has not been used at all.

Thus, a soap bar not used is a new bar of soap. Since the y-intercept represents this, it shows that a new bar of soap is 123 grams.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.