A batch of weighing machines has been purchased and one machine selected at random for testing. Ten weighing tests have been conducted and the errors found noted as follows;
Test: 1 2 3 4 S 6 7 8 9 10
Error (gms): 4.6 8.2 2.1 6.3 5.0 3.6 1.4 4.1 7.0 4.5
The purchasing manager has previously accepted machines with a mean error of 3.8gms and
asserts these tests are below standard. Test the assertion at 5% level. ​

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

step-by-step explanation:

yeah i know the problem you need. i am taking it right now. the answer is step 3

~mickey