Answers by David Soergel
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Answers by David Soergel

Answers by David Soergel
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A 2-kW electric heater takes 15 min to boil a quantity of water. If this is done once a day and power costs 10 cents per kWh, what is the cost of its operation for 30 days?
answered Oct 20, 2021
3 votes
156k views
A quadrilateral has angle measures of 120°, 37°, and 48°. What is the measure of the fourth angle? 105° 155° 95° 120°
answered Sep 11, 2021
3 votes
43.9k views
A rectangle has a height of 5y^3 and a width of 3y^3-8y^2+2y. Express the area of the entire rectangle. Your answer should be a polynomial in standard form.
answered Jul 29, 2021
2 votes
195k views
Simplify the resulting equation x = 0 • 11 • 70?
answered Jul 16, 2021
4 votes
186k views
What is the value of 12^0?​
answered Jul 10, 2021
3 votes
75.0k views
13. Write an equation for the given function given the amplitude, period, phase shift, and vertical shift. amplitude: 4, period 4 phase shift = vertical shift = -2
answered Apr 28, 2021
5 votes
106k views
The sum of two numbers is (−12). What two numbers could you have?
answered Mar 30, 2021
3 votes
79.4k views
When the cobalt (II) solution completely dries out, the color of the remaining solid changes to blue color. What would be the chemical formula of ion in the solid responsible for the color change?
answered Feb 23, 2021
2 votes
18.7k views
Which of the following is an essential difference between apes and hominins?
answered Feb 15, 2021
3 votes
117k views
What is the main way a representative democracy differs from a direct democracy? Citizens elect leaders who vote on the issues in a representative democracy, and citizens vote on the issues in a direct
answered Oct 22, 2020
1 vote
81.7k views
If a car drove 121km/hr on average how far did it travel in 116min?
answered Oct 13, 2020
2 votes
940 views
How many terms are in this problem ? y + 9 - 4x^3 ?
answered Jun 19, 2020
4 votes
56.8k views
Carlon plans to evaporate a number of gallons of water from 90 gallons of a 15% salt solution to make a 25% salt solution. Which equation can he use to find x, the number of gallons that should be evaporated?
answered Jun 18, 2020
2 votes
186k views
Please explain why the inoculated plates are inverted during incubation.
answered Feb 18, 2020
3 votes
173k views
Why is it important to have the correct bond angles of the different atoms and the shape of the molecule? (20 points NEED ANSWER ASAP)
answered Oct 2, 2019
3 votes
37.8k views
Toddlers with poor self-regulation skills are less likely to demonstrate behavior problems in preschool. a. True b. False
answered May 31, 2019
4 votes
174k views
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