5. Why did boy (the observer) hear the pitch of the sound change? What does this tell us about the
frequency of the sound? Support your conclusion based on results from the experiment and your
knowledge of sound waves.

honeycrisps have skyrocketed to about $4.50 per pound

step-by-step explanation:

the true ones are a b and d

the bolded word " farsighted" could be replaced with visionary.

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true