Renaldo plans to take courses in carpentry that will cost $5,250. He mows lawns for $35. How many lawns will he have to mow to pay his courses?
To pay for his courses, Renaldo will have to mow lawns for a total of 5250 / 35 = <<5250/35=150>>150 lawns. Answer: \boxed{150}.
Makiba's family has been saving $2,000 a year for 18 years toward her college education. Makiba herself has been saving $250 a month for the past four year. She wants to complete a four-year program costing $15,000 a year, how much will have to be covered by scholarships or student loans?
The total savings from Makiba's family over 18 years is $2,000/year * 18 years = $<<2000*18=36000>>36,000.
Makiba's personal savings amount to $250/month * 12 months/year * 4 years = $<<250*12*4=12000>>12,000.
In total, Makiba has saved $36,000 + $12,000 = $<<36000+12000=48000>>48,000.
The total cost of the four-year program is $15,000/year * 4 years = $<<15000*4=60000>>60,000.
The amount that will need to be covered by scholarships or student loans is $60,000 - $48,000 = $<<60000-48000=12000>>12,000. Answer: \boxed{12,000}.
Tennille made $2,000 on a summer job. She put it in a bank account paying simple interest of 5% annually. If Tenille lets her money earn interest for 10 years, how much will she have?
The formula to calculate simple interest is:
Interest = Principal * Rate * Time
In this case, Tennille's principal is $2,000, the rate is 5% (or 0.05 as a decimal), and the time is 10 years. Plugging these values into the formula, we get:
Interest = $2,000 * 0.05 * 10 = $1,000
So, Tennille will have $2,000 + $1,000 = $<<2000+1000=3000>>3,000 after 10 years. Answer: \boxed{3,000}.