Questions in Grade High-school

Questions in Grade High-school

[Open]A salesman bought 2 dozen television sets at $300 each. He sold two-thirds of them at a 25% profit but was forced to take a 30% loss on the rest. What was his total profit or loss on the television sets?

[Open]A roadside vegetable stand sells pumpkins for $5 each and squashes for $3 each. One day, they sold 6 more squashes than pumpkins, and their sales totaled $98. Write and solve a system of equations to find how many pumpkins and squashes they sold.

[Open]What is the average speed of a car that traveled 300.0 miles in 5.5 hours?

[Open]Determine the amount of potential energy of a 5-newton book that is moved to three different shelves on a bookcase. The height of each shelf is 1.0 meter, 1.5 meters, and 2.0 meters.

[Open]Sea cucumbers are members of this phylum: a. Porifera (sponges) b. Cnidarians c. Nematoda d. Platyhelminthes e. Annelida f. Echinodermata g. Mollusca h. Arthropoda

[Open]At 3:30 P.M., what is the angle between the hands of a clock?

[Open]If \( x \) and \( y \) are negative integers and \( x - y = 1 \), what is the least possible value for \( xy \)?

[Open]What is the velocity of a 500-kilogram elevator that has 4,000 joules of energy?

[Open]Calculate the molar mass of the following compounds: 1. CaCl\(_2\) 2. Ca(NO\(_3\))\(_2\) 3. Ca(OH)\(_2\) 4. CaSO\(_4\) 5. BaCl\(_2\)

[Open]Write a definition of homologous chromosomes using the terms "gene" and "allele."