1.4*10^9-8.6*10^8
1.4 times 10 to the power of 9 minus 8.6 times 10 to the power of 8
express answer in scientific notation
I need help ASAP

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

When y’all answer can y’all explain too !