Dimensional analysis! a city that uses 6 million btus of energy each month is using how many kilowatt-hours of energy? 1 kw-hr=3413 btus. show all conversions and include units with them. you may use scientific notation if necessary and round to two decimals if necessary.

1 BTU = 1.054x10^3 J  

1 kWh = 3.60x10^6 J  

1.054x10^3 J x 1kWh / 3.60x10^6 J = 2.928x10^-4 kWh  

1 BTU = 2.928x10^-4 kWh  

10,000,000,000 x 2.928^-4 = 2,927,778 kWh

Step-by-step explanation:

sorry, can't i suggest going to algebra.com

step-by-step explanation:

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40