Cho X là biến ngẫu nhiên rời rạc có bảng phân phối xác suất x 1 2 3 4 5 6 7
P a 2a 2a 3a a² 2a² a(7a + 1)
a. Xác định tham số a.
b. Với a tìm được, tính P(X≥4).
c. Tìm kỳ vọng và phương sai của X.

Ds unlimited has the following transactions during august. august 6 purchases 58 handheld game devices on account from gamegirl, inc., for $140 each, terms 2/10, n/60. august 7 pays $340 to sure shipping for freight charges associated with the august 6 purchase. august 10 returns to gamegirl three game devices that were defective. august 14 pays the full amount due to gamegirl. august 23 sells 38 game devices purchased on august 6 for $160 each to customers on account. the total cost of the 38 game devices sold is $5,448.51. required: record the transactions of ds unlimited, assuming the company uses a perpetual inventory system. (if no entry is required for a transaction/event, select "no journal entry required" in the first account field. round your answers to 2 decimal places.)

Which of the following does not offer an opportunity for timely content? evergreen content news alerts content that suits seasonal consumption patterns content that matches a situational trigger content that addresses urgent pain points

Acorporation a. can use different depreciation methods for tax and financial reporting purposes b. must use the straight - line depreciation method for tax purposes and double declining depreciation method financial reporting purposes c. must use different depreciation method for tax purposes, but strictly mandated depreciation methods for financial reporting purposes d. can use straight- line depreciation method for tax purposes and macrs depreciation method financial reporting purposes