The poetry club had its first bake sale, and they made $79.35. the club members are planning to have 4 more bake sales. leslie said, "if we make the same amount at each bake sale, we’ll earn $3,967.50." peggy said, "no way, leslie! we’ll earn $396.75 after five bake sales." use estimation to peggy explain why leslie’s reasoning is inaccurate. show your reasoning using words, numbers, or pictures.

During its first bake sale, the poetry club made $79.35. If we round up to $80, this will make it easier to estimate how much they will make if they have 4 more bake sales (5 altogether). Next, we should use multiplication to determine how much money they will earn altogether after 5 bake sales. Five times $80 equals $400. Leslie accidentally multiplies by 50 because she moves the decimal one place too far.

Estimation

Estimation is when you use an approximate calculation to make a prediction. It is important here to note that an estimation is different than guess. In both instances, one should use whatever knowledge is at their disposal; however, an estimation usually uses rounding and actual calculations.

Rounding

When making an estimation, rounding is an effective tool to use. Often numbers are rounded to the nearest whole number or place value. This can make it easier to do a quick calculation. In the word problem, the nearest whole number to 79.35 is 80. This makes it easier to multiply the dollar amount because there are fewer numbers to multiply.

Subject: Math

Level: middle school

Topic: Estimations

estimation, rounding, multiplication

Estimating with percents: link

Estimate: link

According to Question,

In first bake sale, Poetry club earned $79.35

Leslie has made calculation that if they have 4 more bake sales, they earn $3967.5

whereas according to Peggy after 5 bake sales they earn $396.75

First Let's check How much they will earn after 5 bake sales

Amount earned in 1bake sale =$79.35

So,Amount they will earn in 10 bake sales = 10 × 79.35 = $793.5( Simply shift a decimal to right)

Obviously, In 4 bake sales Amount earn < $793.5

But According to leslie they will earn $3967.5 >$793.5

So, Leslie reasoning is inaccurate

For More information,

For 5 bake sales they earn exactly 50%of $793.5

= $396.75 as told by Peggy

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!