In a study of the effect of cooling rate on the hardness of welded joints, 50 welds cooled at a rate of 10oC/s had an average Rockwell (B) hardness of 91.1 and a standard deviation of 6.62, and 40 welds cooled at a rate of 30oC/s had an average hardness of 90.7 and a standard deviation of 4.62. Ten more welds will be made in order to increase the precision of the confidence interval. Which would increase the precision the most, cooling all 10 welds at the rate of 10oC/s, cooling all 10 welds at the rate of 30oC/s, or cooling 5 welds at 10oC/s and 5 at 30oC/s

answer:

some responsibilities that come with having a checking account -

1. we have to maintain check register with exactness to avoid checks being returned for insufficient funds which is called bouncing a check.

2. we need to update our check register each time we make a transaction using a convenience card. updating check register will   save   us from   overdrawing of checking account.

3. read the agreement the bank gave you when you signed up for our checking account. this includes all the fees and the minimum balance we need to keep in our account to avoid maintenance charges.  

explanation:

note : -   checking account is a transactional deposit account. we can use it to deposit and withdraw funds. money in a checking account is very liquid. it   can be withdrawn using electronic debits, automated cash machines, or checks among other methods.

x > 4

step-by-step explanation:

solve for   x by simplifying both sides of the equation, then isolating the variable.

the picking cards and marbles hope this