HELP ASAP!! WILL GIVE BRAINLIEST Andrew measured the time it took for an apple to fall 50 feet as 1.95 seconds, but his calculations show that it should be 1.77 seconds. What was his experimental error?

The given problem is : −4.5 + 4.2 + 5.6 − 7.3

The order for solving an arithmetic problem is as follows :

Parentheses,

Exponentiation,

Multiplication,

Addition,

Subtraction,

We can rewrite the given problem as : 4.2 + 5.6 - 7.3 - 4.5

Taking 4.2 and 5.6 together in bracket : (4.2 + 5.6) - 7.3 - 4.5

= 9.8 - 7.3 - 4.5

= 2.5 - 4.5

= -2

Hence, the answer for given problem is -2, but Andrew get -21.6 which is wrong.

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