In both types of reactions, new substances are formed and there are changes in energy. However, endothermic reactions absorb energy, whereas exothermic reactions release energy. Reteach Change the boldface sentences into questions, and call on students to answer them.
The average monthly cell phone bill has soared in recent years to well over $100. A study earlier this year found that Verizon (VZ) was the most expensive carrier, with an average customer bill of $148 a month. Sprint (S) and AT&T (T) weren't that far behind, and T-Mobile (TMUS) was the least expensive of the Big Four carriers at $120.
(The exact figure will depend on the customer's climate zone and baseline allotment.) Customers who use 850 kWh per month would see an increase of $0.84 in their average bill, from $176.77 to $177.61. Customers who use 1,500 kWh would see a decline in average bills of $108.62, from $480.08 to $371.46.