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.
Many telemarketing companies bill by the hour based on call times. Expect to pay anywhere from $10 to $70 per hour, with an average price of around $25 to $50 per hour. Other firms may charge by the lead, with costs averaging around $35 to $60 per lead.