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• triangle a b c is shown. angle a c b is a right angle. the length of hypotenuse a b is 12 centimeters, the length of c b is 9.8 centimeters, and the length of a c is 6.9 centimeters. which expressions can be used to find m∠bac? select three options. cos−1(startfraction 6.9 over 12 endfraction) cos−1(startfraction 9.8 over 12 endfraction) sin−1(startfraction 6.9 over 12 endfraction) sin−1(startfraction 9.8 over 12 endfraction) tan−1(startfraction 6.9 over 9.8 endfraction)
  
• the ability to develop and use tools was first seen in early hominids. which of the following characteristics was the main factor that contributed to this ability?
  
• newport township is building a new playground area for neighborhood kids. the playground will be a square with a perimeter of 56 + 8 3 x an equivalent expression is 56 + 8 ( 1 3 x ). which expression represents the length of one of the playground's sides? 224 + startfraction 32 over 3 endfraction x 14 + two-thirds x 14 + startfraction 8 over 3 endfraction x 4 (56 + startfraction 8 over 3 endfraction x)
  
• sunlight heats the land and water at different rates. during the day the heated land quickly heats the air over it more than the air over the ocean causing a convection current. which diagram best shows the formation of a convection current at the beach?
  
• pamela ___________ trabajar en la biblioteca el próximo semestre. a. tiene razón b. tiene vergüenza c. tiene pensado d. tiene cuidado
  
• which is true about the completely simplified difference of the polynomials a3b + 9a2b2 − 4ab5 and a3b − 3a2b2 + ab5? the difference is a binomial with a degree of 5. the difference is a binomial with a degree of 6. the difference is a trinomial with a degree of 5. the difference is a trinomial with a degree of 6.
  
• what is a negative impact of digital communication? a. access to information b. ability to communicate across continents c. information can be difficult to verify d. new marketplaces for more competition
  
• use the following compound interest formula to complete the problem.a = p (1 + startfraction r over n endfraction) superscript n superscript trodney owes $1,541.05 on his credit card. his card has an apr of 16.29%, compounded monthly. assuming that he makes no payments and no purchases, how much will he owe after one year?a.$1,561.97b.$1,811.70c.$1,792.09d.$1,541.05
  
• a cell phone uses a 3.0 v battery. the circuit board it uses needs a 0.05 a current. what size resistor is needed to generate this current? ω
  
• which particles that make up an atom are involved in nuclear reactions? protons only protons and neutrons electrons only electrons and neutrons