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There's actually 8 "types"(which i consider classes) of echinoderms we know today, 2 of them are extincted, the 2 extincted ones are homalozoa and helicoplacoidea. The 6 living today are crinoidea(includes sea lilies)asteroidea(which includes star fishes)ophiuroidea(which includes brittle stars) echinoidea (which includes sea urchin)holothuroidea(which includes sea cucumber, which i like to call sea pickles) and last and least, concentricycloidea(which includes sea dasies, the reason they're least is because there's only 2 species of them known so far). If you're talking about sub-phylums of echinoderms, i believe there are 2 of them, i have no idea what the 2 extincted ones go in to, but i think scienctists only classify species that's not dead, the 2 subphylum are pelmatozoa(which includes only crinoidea) and there's eleutherozoa(which includes all of the classes except homalazoa, heli and crinoidea)
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If A school has 18 classes with 35 students in each class In order to reduce class size to 30 How many classes must be formed?
A school has 18 classes with 35 students in each class. In order to reduce class size to 30, how many new classes must be formed?
A school has 18 classes with 35 students in each class. in order to reduce class size to 30how many new classes need to be formed?
A school has 18 classes with 35 students in each class. In order to reduce class size to 30, how many new classes must be formed?
A school has 18 classes with 35 students in each class In order to reducew the class size to 30 How many new classes must be formed?
3
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A school has 18 classes with 35 students in each class In order to reduce class size to 30 how many new classes must be formed?
You reduce each class by 5 (existing - new), and you have 18 classes (given).Multiplying, you have 90 extra students. To put them in classes of 30, divide.90 / 30 = 3 new classes.Three more classes because 18*35 = 630 and 630/30 = 21
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