In right triangle DEF, ∠E is a right angle, m∠D=26∘, and DF=4.5. sin26∘≈0.44
cos26∘≈0.90
tan26∘≈0.49

What is the measurement of EF?
If necessary, round your answer to two decimal places, like this: 42.53

The probability that you roll a two on a six-sided die is 1 6 16 . if you roll the die 60 times, how many twos can you expect to roll

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g