Phytoremediation is the use of plant growth to purify pollutants from soil, water, or air. Suppose that a crop of brake ferns can remove 15 milligrams (\text{mg})(mg)left parenthesis, start text, m, g, end text, right parenthesis per square meter of a particular pollutant from the soil in 20 weeks. After 20 weeks, the ferns are harvested and a new crop is planted. If ccc represents the number of crops of brake ferns needed to phytoremediate soil contaminated with 170\,\text{mg}170mg170, start text, m, g, end text per square meter of the pollutant down to healthy levels of 5\,\text{mg}5mg5, start text, m, g, end text per square meter, which equation best models the situation?

757764

step-by-step explanation:

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2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

what are you trying find out?

step-by-step explanation:

step-by-step explanation: