Which statement explains why African slavery was introduced to the Americas?A. The Spanish needed a large army to defeat the Indigenous peoples, and enslaved Africans were immune to diseases found in the Americas. B. The Spanish conquered Africa and enslaved millions of African people. C. The Indigenous population was reduced, so enslaved Africans were forced to work on the sugar plantations. D. A potato famine in Africa forced millions of starving Africans into slavery.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.