What is the standard form of '((2+31)(4-71))/((1-1)) ?

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2

X+y ≥20 x≤2y a) (0,22) b) (7,11) c) ( 15,6) d) (10,10) e) (12,5) f) (8,16)

The half-life of a certain material is 0.002 second. approximately how much of a 14-gram sample will be left after 0.004 second? a. 12 grams b. 3.5 grams c. 0.06 gram d. 7 grams