5.4x10 to the 3 power in standard form

If you toss a coin three times, what are the odds against getting exactly three heads? (A 1:8) (B 8:1) (C 1:7) (D 7:1)

For which value of x must the expression 41x be further simplified?

Is 5 (2x-3y) and 10x-3y equivalent?

The weekly cost per person to rent a cottage on a lake varies inversely with the number of people who share the cost ... 4 people share the cost, each one pays $312.

Student-Facing Statement A circle has radius 50 cm. Which of these is closest to its area?

What number gives a result of - 8 when 11 is subtracted from the quotient of the number and 6?

He product of a non-zero rational number and an irrational number can always be written as a) a fraction. b) a terminating decimal. c) a non-repeating, non-terminating decimal. d) a repeating decimal

Who has the right to levy taxes on the income of individuals and businesses by the ruling of the 16th Amendment of the Constitution that was signed into law in 1913? A. Congress B. The governor C. The president D. The Supreme Court

X - 7 = 18 isn't this 25

If the square of twice a number is 81, what is the number? I tried doing 2x^2=81 but that did not come out to the answer 4.5,-4.5