katlyn10289
02.11.2020 •
Mathematics
Hey would you guys mind helping my sis out with the circled questions pls
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Ответ:
19.) must add 9.02 to both sides the answer will be n= 12.87
20.) must subtract 31.53 from 62.4 but add a zero behind the 4 in the number 62.4 and the answer will be r=30.87
22.) Jake needs about 2.21 meters of wood to complete the school project.
Step-by-step explanation:
Ответ:
z=(x-μ)/σ
where:
μ-mean
σ-standard deviation
hence:
z=(240-200)/20
z=2