A car radiator has a 16-quart capacity and is currently filled with a 40% antifreeze solution. How many quarts of this solution should be drained off and replaced with 100% antifreeze so that the radiator is filled with a 50% antifreeze solution

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Anyone know? will mark brainliest if you're correct!

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191