Pls help me 1.- El 25% de 400 ÷ 10 X 9 el 50% =

2.- El 20% de 400 X 6 el 10% el 50% =

3.- El 50% de 1000 el 20% ÷ 10 el 10% =

4.- 90 X 6 el 10% el 50% ÷ 9 al³ =

5.- El 75% de 40 EL 10% al³ - 7 EL 25% =

6.- 12 X 12 EL 25% ÷ 6 X 20 el 10% =

7.- 15 x 15 – 25 el 20% el 50% ÷ 20 =

8.- 2 al³ X 40 + 320 + 60 ÷ 100 =

9.- 10 al² X 9 ÷ 3 el 20% ÷ 12 =

10.- 3 X 7 + 21 ÷ 3 ÷ 7 al cubo =

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297