A student writes the inequality x > 17 in interval notation as [17, POS INF]. Explain why this is incorrect.

Mathematics

1 answer:

krok68 [10]3 years ago

8 0

Answer:

see explanation

Step-by-step explanation:

[ 17, + ∞ ] are used to indicate that the values inside are equal to the 2 limits, that is that x can equal 17 or + ∞

However, this as not the case as x > 17 indicates x is greater than 17 but not equal to it. This is also true for + ∞

To represent this situation parenthesis is used, that is

(17, + ∞ )

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ivolga24 [154]

More specific please?

3 0

3 years ago

CAN SOMEONE HELP ME !!!!!!!!!

MissTica

Answer:

She will get 80mg of dextromethorphan and 800mg of guaifenesin. And the bottle last for 6 days approximately.

Step-by-step explanation:

Given that the Robitussin DM contains dextromethorphan 10mg/5mL and gualfenesin 100mg/5mL. And we are also given that Mrs Smith took four doses and each dose is 2 teaspoons=2X5=10mL.

So, four doses=4X10=40mL.

So, dextromethorphan in 4 doses is = $\frac{10}{5}X40=80mg$

And Guaifenesin in 4 doses is = $\frac{100}{5}X40=800mg$

Dosage of medicine daily she has to take=40mL and the bottle contains 237 mL. Hence the number of days bottle last = $\frac{237}{40}=5.925$ ≈6 days approximately.