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Questions in Grade High-school

[Homework Help] Propane and oxygen react according to the equation: \[ \text{C}_3\text{H}_8(g) + 5\text{O}_2(g) \rightarrow 3\text{CO}_2(g) + 4\text{H}_2\text{O}(g) \] How many grams of water can be produced from the complete combustion of 2.0 moles of \(\text{C}_3\text{H}_8(g)\)? A. 144.0 B. 82.0 C. 8.0 D. 44.8 E. 22.4

[Homework Help] How many square units are in the greatest area that can be enclosed by a rectangle with a perimeter of 20 units?

[Homework Help] The shape of the clock is a regular dodecagon with a radius of 14 cm. Centered on the clock's face is a green circle with a radius of 9 cm. If the region outside the circle is purple, which color has more area?

[Homework Help] What were Betsy Ross's accomplishments in her lifetime?

[Homework Help] What are the three main functions of roots?

[Homework Help] The area of a football field can be calculated by multiplying the length and width of the field. Given: Length = 360 feet (120 yards) Width = 160 feet (53 1/3 yards) Find the area of a regulation football field in square feet. \[ A = L \times W \]

[Homework Help] A father with type B blood and a mother with type A blood have a child. Their child, while in a biology lab at school, tests her blood and discovers she has type O blood. Does she have any concerns about her parentage? A. Yes, because she should have type AB blood if they are her true biological parents. B. No, because type O blood is possible if her parents both had genotypes AB. C. No, because both of her parents could be heterozygous. D. Yes, because both of her parents might be heterozygous. E. No, because blood types A and B are codominant.

[Homework Help] The temperature dropped by -2.5 Celsius degrees for 5 consecutive days. What was the total decrease in temperature over the 5-day period, expressed as a signed number?

[Homework Help] A merchant buys an old carpet for $25.00. He spends $15.00 to have it restored to good condition and then sells the rug for $50.00. What is the percent profit on his total investment?

[Homework Help] As a bowling instructor, you figure your students' averages during tournaments. In 5 games, one bowler had the following scores: 143, 156, 172, 133, and 167. What was that bowler's average?