Which is bigger 0.78 or 0.875

Answers

Answer 1

Answer: 0.875 is because the first digit that is different is in the tenths place and the 8 in 0.875 is larger in value than the 7 in 0.78

Hope this helps :)

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1. Discuss the differences between the measurement of the surface area and the measurement of the volume of a right rectangular prism. Include the following topics in your discussion:• Description of regions that are measured
• Units for each type of measure and why the units are different
• Examples of when you would want to measure for each type of measure.

Answers

Surface area define or calculate the exact space that each face of the said shape is taken up while the volume is how much space is inside the said object. The area use the unit that is squared because it only measured 2 face in the shape while the volume measures 3 faces in the object. an example of an area is a card board area, while the volume is the glass of water.

Cos A = square root 21 divided by 5 and sin A = 2/5. What is the exact value of cos 2A?

Answers

$cos\alpha=(√(21))/(5);\ sin\alpha=(2)/(5)\n\n\ncos2\alpha=cos^2\alpha-sin^2\alpha\n\ncos^2\alpha=\left((√(21))/(5)\right)^2=(21)/(25)\n\nsin^2\alpha=\left((2)/(5)\right)^2=(4)/(25)\n\ncos2\alpha=(21)/(25)-(4)/(25)=(17)/(25)$

3456.0g to cg in scientific notation

Answers

Answer:

Scientific Notation : 3.456 × 10^3

Help asap I only have 10 minutes!Heidi grew her hair out for many years. Her hair was 1 1/3 of a meter long. She donated her hair by cutting off 5/6of a meter.
How long is Heidi's hair now?

Answers

Answer:

Heidi's hair is only half a meter long now.

1/2 of a meter

Step-by-step explanation:

1 1/3 - 5/6

= 1 2/6 - 5/6

= 3/6

= 1/2

I hope this helped! Happy new year :)

Answer:

3/6 or 1/2 meter lomg.

Step-by-step explanation:

Giselle works as a carpenter and as a blacksmith. She earns $20\$20 $20 dollar sign, 20 per hour as a carpenter and $25\$25 $25 dollar sign, 25 per hour as a blacksmith. Last week, Giselle worked both jobs for a total of 3030 30 30 hours, and earned a total of $690\$690 $690 dollar sign, 690 . How long did Giselle work as a carpenter last week, and how long did she work as a blacksmith? Giselle worked as a carpenter for hours and as a blacksmith for hours last week.

Answers

c = # of carpenter hrs , b = # of blacksmith hrs

c + b = 30...c = 30 - b
20c + 25b = 690

20(30 - b) + 25b = 690
600 - 20b + 25b = 690
-20b + 25b = 690 - 600
5b = 90
b = 90/5
b = 18 <== hrs worked as blacksmith

c + b = 30
c + 18 = 30
c = 30 - 18
c = 12 <== hrs worked as carpenter

Answer:

Carpenter: 12 hours and Blacksmith: 18 hour

Step-by-step explanation:

A construction manager needs 12 workers to complete a building project in 54 days. Find in terms of T the number of workers needed to complete the same project in T days