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.
Calls typically cost between 5p and 12.5p per minute for landline customers. From a mobile phone, calls may cost between 25p and 41p per minute. Services provided on these numbers are regulated by *PhonepayPlus to provide additional protection for callers.You can fi nd out more information at www.phonepayplus.org.uk.alls from landlines are typically charged between 1p and 9p per minute and calls from mobiles between 5p and 31p per minute. For landlines there is normally also a call setup fee and call charges are dependent on the time of day.