Question

Tammy estimated the product of 4.2 and 5.9, then calculated the exact product. Analyze her work and decide if she made an error. Tammy estimated the product of 4.2 and 5.9, then calculated the exact product. Analyze her work and decide if she made an error.

Estimated product: 4.2 (5.9) almost-equals 4 (6) almost-equals 24. Exact product: 4.2 (5.9) = 2.478.

Which statement about Tammy’s work is true?
A Tammy’s estimate is wrong because the actual product is 2.478. B Tammy’s estimate is wrong because the actual product is 247.8. C Tammy’s estimate is right, but the actual product should be 24.78. D Tammy’s estimate is right, but the actual product should be 0.2478
which one is correct?

Answer 1

Question :- Tammy estimated the product of 4.2 and 5.9, then calculated the exact product. Analyze her work and decide if she made an error.

Estimated product :- 4.2 (5.9) almost-equals 4 (6) almost-equals 24.

Exact product :- 4.2 (5.9) = 2.478.

Which statement about Tammy’s work is true ?

A) Tammy’s estimate is wrong because the actual product is 2.478.

B) Tammy’s estimate is wrong because the actual product is 247.8.

C) Tammy’s estimate is right, but the actual product should be 24.78.

D) Tammy’s estimate is right, but the actual product should be 0.2478 which one is correct ?

Solution :-

Tammy has to multiply 4.2 and 5.9 .

Values he took :-

• 4.2 = almost equal to 4.
• 5.9 = almost equal to 6.

So,

→ Estimated Product he calculated = 4 * 6 = 24.

After that, he calculated the exact product by taking exact numbers.

So,

→ 4.2 * 5.9 = 2.478 .

Error :- ( in Exact Product.)

→ 4.2 * 5.9

→ (42/10) * (59/10)

→ (42 * 59)/100

→ (2478)/100

→ 24.78 .

→ which is equal to 24 (Approx).

Hence, we can conclude that, Tammy’s estimate is right, but the actual product should be 24.78. (Option C.)

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Answer 2

Answer:

C.

Step-by-step explanation:I took the test and i got it right u guys r prob in a rush so u cant read the guy above me's things so yea its C