Graph the inequality on a number line
S < 1 3/4

Im so bad at fractions they are not my best math thing to work on

Harry owes the bank money. to repay his debt, he paid $150 back to the bank each month. after 10 months, his remaining debt was $6900. what was the original amount of harry's debt? how long did it take harry to pay back his entire debt?

Me with these questions , i don’t understand scientific notation!